diff --git a/src/registrar/admin.py b/src/registrar/admin.py
index 2d750874e..607313f2d 100644
--- a/src/registrar/admin.py
+++ b/src/registrar/admin.py
@@ -493,6 +493,8 @@ class CustomLogEntryAdmin(LogEntryAdmin):
     #     return super().change_view(request, object_id, form_url, extra_context=extra_context)
 
 
+# TODO #2571 - this should be refactored. This is shared among every class that inherits this,
+# and it breaks the senior_official field because it exists both as model "Contact" and "SeniorOfficial".
 class AdminSortFields:
     _name_sort = ["first_name", "last_name", "email"]
 
@@ -555,15 +557,16 @@ class AuditedAdmin(admin.ModelAdmin):
             )
         )
 
-    def formfield_for_manytomany(self, db_field, request, **kwargs):
+    def formfield_for_manytomany(self, db_field, request, use_admin_sort_fields=True, **kwargs):
         """customize the behavior of formfields with manytomany relationships.  the customized
         behavior includes sorting of objects in lists as well as customizing helper text"""
 
         # Define a queryset. Note that in the super of this,
         # a new queryset will only be generated if one does not exist.
         # Thus, the order in which we define queryset matters.
+
         queryset = AdminSortFields.get_queryset(db_field)
-        if queryset:
+        if queryset and use_admin_sort_fields:
             kwargs["queryset"] = queryset
 
         formfield = super().formfield_for_manytomany(db_field, request, **kwargs)
@@ -574,7 +577,7 @@ class AuditedAdmin(admin.ModelAdmin):
         )
         return formfield
 
-    def formfield_for_foreignkey(self, db_field, request, **kwargs):
+    def formfield_for_foreignkey(self, db_field, request, use_admin_sort_fields=True, **kwargs):
         """Customize the behavior of formfields with foreign key relationships. This will customize
         the behavior of selects. Customized behavior includes sorting of objects in list."""
 
@@ -582,7 +585,7 @@ class AuditedAdmin(admin.ModelAdmin):
         # a new queryset will only be generated if one does not exist.
         # Thus, the order in which we define queryset matters.
         queryset = AdminSortFields.get_queryset(db_field)
-        if queryset:
+        if queryset and use_admin_sort_fields:
             kwargs["queryset"] = queryset
 
         return super().formfield_for_foreignkey(db_field, request, **kwargs)
@@ -1544,6 +1547,17 @@ class DomainInformationAdmin(ListHeaderAdmin, ImportExportModelAdmin):
         # Get the filtered values
         return super().changelist_view(request, extra_context=extra_context)
 
+    def formfield_for_foreignkey(self, db_field, request, **kwargs):
+        """Customize the behavior of formfields with foreign key relationships. This will customize
+        the behavior of selects. Customized behavior includes sorting of objects in list."""
+        # TODO #2571
+        # Remove this check on senior_official if this underlying model changes from
+        # "Contact" to "SeniorOfficial" or if we refactor AdminSortFields.
+        # Removing this will cause the list on django admin to return SeniorOffical
+        # objects rather than Contact objects.
+        use_sort = db_field.name != "senior_official"
+        return super().formfield_for_foreignkey(db_field, request, use_admin_sort_fields=use_sort, **kwargs)
+
 
 class DomainRequestResource(FsmModelResource):
     """defines how each field in the referenced model should be mapped to the corresponding fields in the
@@ -2211,6 +2225,17 @@ class DomainRequestAdmin(ListHeaderAdmin, ImportExportModelAdmin):
 
         return None
 
+    def formfield_for_foreignkey(self, db_field, request, **kwargs):
+        """Customize the behavior of formfields with foreign key relationships. This will customize
+        the behavior of selects. Customized behavior includes sorting of objects in list."""
+        # TODO #2571
+        # Remove this check on senior_official if this underlying model changes from
+        # "Contact" to "SeniorOfficial" or if we refactor AdminSortFields.
+        # Removing this will cause the list on django admin to return SeniorOffical
+        # objects rather than Contact objects.
+        use_sort = db_field.name != "senior_official"
+        return super().formfield_for_foreignkey(db_field, request, use_admin_sort_fields=use_sort, **kwargs)
+
 
 class TransitionDomainAdmin(ListHeaderAdmin):
     """Custom transition domain admin class."""
@@ -2260,6 +2285,7 @@ class DomainInformationInline(admin.StackedInline):
     def formfield_for_manytomany(self, db_field, request, **kwargs):
         """customize the behavior of formfields with manytomany relationships.  the customized
         behavior includes sorting of objects in lists as well as customizing helper text"""
+
         queryset = AdminSortFields.get_queryset(db_field)
         if queryset:
             kwargs["queryset"] = queryset
@@ -2274,8 +2300,12 @@ class DomainInformationInline(admin.StackedInline):
     def formfield_for_foreignkey(self, db_field, request, **kwargs):
         """Customize the behavior of formfields with foreign key relationships. This will customize
         the behavior of selects. Customized behavior includes sorting of objects in list."""
+        # Remove this check on senior_official if this underlying model changes from
+        # "Contact" to "SeniorOfficial" or if we refactor AdminSortFields.
+        # Removing this will cause the list on django admin to return SeniorOffical
+        # objects rather than Contact objects.
         queryset = AdminSortFields.get_queryset(db_field)
-        if queryset:
+        if queryset and db_field.name != "senior_official":
             kwargs["queryset"] = queryset
         return super().formfield_for_foreignkey(db_field, request, **kwargs)
 
@@ -2948,6 +2978,7 @@ class PortfolioAdmin(ListHeaderAdmin):
     autocomplete_fields = [
         "creator",
         "federal_agency",
+        "senior_official",
     ]
 
     # Q for reviewers: What should this be called?
diff --git a/src/registrar/assets/sass/_theme/_register-form.scss b/src/registrar/assets/sass/_theme/_register-form.scss
index 7c93f0a10..41d2980e3 100644
--- a/src/registrar/assets/sass/_theme/_register-form.scss
+++ b/src/registrar/assets/sass/_theme/_register-form.scss
@@ -25,7 +25,7 @@
   }
 }
 
-h3.register-form-review-header {
+.register-form-review-header {
   color: color('primary-dark');
   margin-top: units(2);
   margin-bottom: 0;
diff --git a/src/registrar/config/urls.py b/src/registrar/config/urls.py
index 63026f931..3d13cf729 100644
--- a/src/registrar/config/urls.py
+++ b/src/registrar/config/urls.py
@@ -74,6 +74,11 @@ urlpatterns = [
         views.PortfolioOrganizationView.as_view(),
         name="organization",
     ),
+    path(
+        "senior-official/",
+        views.PortfolioSeniorOfficialView.as_view(),
+        name="senior-official",
+    ),
     path(
         "admin/logout/",
         RedirectView.as_view(pattern_name="logout", permanent=False),
diff --git a/src/registrar/forms/domain.py b/src/registrar/forms/domain.py
index 55b6619d9..02299395f 100644
--- a/src/registrar/forms/domain.py
+++ b/src/registrar/forms/domain.py
@@ -358,10 +358,14 @@ class SeniorOfficialContactForm(ContactForm):
     """Form for updating senior official contacts."""
 
     JOIN = "senior_official"
+    full_name = forms.CharField(label="Full name", required=False)
 
     def __init__(self, disable_fields=False, *args, **kwargs):
         super().__init__(*args, **kwargs)
 
+        if self.instance and self.instance.id:
+            self.fields["full_name"].initial = self.instance.get_formatted_name()
+
         # Overriding bc phone not required in this form
         self.fields["phone"] = forms.IntegerField(required=False)
 
@@ -384,6 +388,12 @@ class SeniorOfficialContactForm(ContactForm):
         if disable_fields:
             DomainHelper.mass_disable_fields(fields=self.fields, disable_required=True, disable_maxlength=True)
 
+    def clean(self):
+        """Clean override to remove unused fields"""
+        cleaned_data = super().clean()
+        cleaned_data.pop("full_name", None)
+        return cleaned_data
+
     def save(self, commit=True):
         """
         Override the save() method of the BaseModelForm.
diff --git a/src/registrar/forms/portfolio.py b/src/registrar/forms/portfolio.py
index 9362c7bbd..14a45f6ae 100644
--- a/src/registrar/forms/portfolio.py
+++ b/src/registrar/forms/portfolio.py
@@ -4,7 +4,7 @@ import logging
 from django import forms
 from django.core.validators import RegexValidator
 
-from ..models import DomainInformation, Portfolio
+from ..models import DomainInformation, Portfolio, SeniorOfficial
 
 logger = logging.getLogger(__name__)
 
@@ -67,3 +67,31 @@ class PortfolioOrgAddressForm(forms.ModelForm):
             self.fields[field_name].required = True
         self.fields["state_territory"].widget.attrs.pop("maxlength", None)
         self.fields["zipcode"].widget.attrs.pop("maxlength", None)
+
+
+class PortfolioSeniorOfficialForm(forms.ModelForm):
+    """
+    Form for updating the portfolio senior official.
+    This form is readonly for now.
+    """
+
+    JOIN = "senior_official"
+    full_name = forms.CharField(label="Full name", required=False)
+
+    class Meta:
+        model = SeniorOfficial
+        fields = [
+            "title",
+            "email",
+        ]
+
+    def __init__(self, *args, **kwargs):
+        super().__init__(*args, **kwargs)
+        if self.instance and self.instance.id:
+            self.fields["full_name"].initial = self.instance.get_formatted_name()
+
+    def clean(self):
+        """Clean override to remove unused fields"""
+        cleaned_data = super().clean()
+        cleaned_data.pop("full_name", None)
+        return cleaned_data
diff --git a/src/registrar/management/commands/load_senior_official_table.py b/src/registrar/management/commands/load_senior_official_table.py
index cbfe479ea..43f61d57a 100644
--- a/src/registrar/management/commands/load_senior_official_table.py
+++ b/src/registrar/management/commands/load_senior_official_table.py
@@ -35,7 +35,6 @@ class Command(BaseCommand):
 
             Note: 
                 - If the row is missing SO data - it will not be added.
-                - Given we can add the row, any blank first_name will be replaced with "-".
             """,  # noqa: W291
             prompt_title="Do you wish to load records into the SeniorOfficial table?",
         )
@@ -64,7 +63,11 @@ class Command(BaseCommand):
                 # Clean the returned data
                 for key, value in so_kwargs.items():
                     if isinstance(value, str):
-                        so_kwargs[key] = value.strip()
+                        clean_string = value.strip()
+                        if clean_string:
+                            so_kwargs[key] = clean_string
+                        else:
+                            so_kwargs[key] = None
 
                 # Handle the federal_agency record seperately (db call)
                 agency_name = row.get("Agency").strip() if row.get("Agency") else None
@@ -95,17 +98,11 @@ class Command(BaseCommand):
     def create_senior_official(self, so_kwargs):
         """Creates a senior official object from kwargs but does not add it to the DB"""
 
-        # WORKAROUND: Placeholder value for first name,
-        # as not having these makes it impossible to access through DJA.
-        old_first_name = so_kwargs["first_name"]
-        if not so_kwargs["first_name"]:
-            so_kwargs["first_name"] = "-"
-
         # Create a new SeniorOfficial object
         new_so = SeniorOfficial(**so_kwargs)
 
         # Store a variable for the console logger
-        if all([old_first_name, new_so.last_name]):
+        if all([new_so.first_name, new_so.last_name]):
             record_display = new_so
         else:
             record_display = so_kwargs
diff --git a/src/registrar/models/user.py b/src/registrar/models/user.py
index 0f75c0499..a532fe5fb 100644
--- a/src/registrar/models/user.py
+++ b/src/registrar/models/user.py
@@ -3,6 +3,7 @@ import logging
 from django.contrib.auth.models import AbstractUser
 from django.db import models
 from django.db.models import Q
+from django.forms import ValidationError
 
 from registrar.models.domain_information import DomainInformation
 from registrar.models.user_domain_role import UserDomainRole
@@ -229,6 +230,16 @@ class User(AbstractUser):
     def has_contact_info(self):
         return bool(self.title or self.email or self.phone)
 
+    def clean(self):
+        """Extends clean method to perform additional validation, which can raise errors in django admin."""
+        super().clean()
+
+        if self.portfolio is None and self._get_portfolio_permissions():
+            raise ValidationError("When portfolio roles or additional permissions are assigned, portfolio is required.")
+
+        if self.portfolio is not None and not self._get_portfolio_permissions():
+            raise ValidationError("When portfolio is assigned, portfolio roles or additional permissions are required.")
+
     def _get_portfolio_permissions(self):
         """
         Retrieve the permissions for the user's portfolio roles.
diff --git a/src/registrar/templates/domain_base.html b/src/registrar/templates/domain_base.html
index 9a869ef42..b99b12740 100644
--- a/src/registrar/templates/domain_base.html
+++ b/src/registrar/templates/domain_base.html
@@ -54,7 +54,7 @@
 
         {% block domain_content %}
 
-        <h1 class="break-word">{{ domain.name }}</h1>
+        <h1 class="break-word">Domain Overview</h1>
 
         {% endblock %}  {# domain_content #}
       {% endif %}
diff --git a/src/registrar/templates/domain_detail.html b/src/registrar/templates/domain_detail.html
index 2e1d31d74..19f196e40 100644
--- a/src/registrar/templates/domain_detail.html
+++ b/src/registrar/templates/domain_detail.html
@@ -5,7 +5,7 @@
 {% block domain_content %}
   {{ block.super }}
   <div class="margin-top-4 tablet:grid-col-10">
-
+    <h2 class="text-bold text-primary-dark">{{ domain.name }}</h2>
     <div
         class="usa-summary-box dotgov-status-box padding-bottom-0 margin-top-3 padding-left-2{% if not domain.is_expired %}{% if domain.state == domain.State.UNKNOWN or domain.state == domain.State.DNS_NEEDED %} dotgov-status-box--action-need{% endif %}{% endif %}"
         role="region"
@@ -57,13 +57,20 @@
       {% include "includes/summary_item.html" with title='DNS name servers' domains='true' value=domain.nameservers list='true' edit_link=url editable=is_editable %}
     {% else %}
       {% if is_editable %}
-      <h2 class="margin-top-3"> DNS name servers </h2>
+      <h3 class="margin-top-3"> DNS name servers </h3>
       <p> No DNS name servers have been added yet. Before your domain can be used we’ll need information about your domain name servers.</p>
       <a class="usa-button margin-bottom-1" href="{{url}}"> Add DNS name servers </a>
       {% else %}
         {% include "includes/summary_item.html" with title='DNS name servers' domains='true' value='' edit_link=url editable=is_editable %}
       {% endif %}
     {% endif %}
+    
+    {% url 'domain-dns-dnssec' pk=domain.id as url %}
+    {% if domain.dnssecdata is not None %}
+      {% include "includes/summary_item.html" with title='DNSSEC' value='Enabled' edit_link=url editable=is_editable %}
+    {% else %}
+      {% include "includes/summary_item.html" with title='DNSSEC' value='Not Enabled' edit_link=url editable=is_editable %}
+    {% endif %}
 
     {% if portfolio and has_domains_portfolio_permission and request.user.has_view_suborganization %}
       {% url 'domain-suborganization' pk=domain.id as url %}
diff --git a/src/registrar/templates/domain_senior_official.html b/src/registrar/templates/domain_senior_official.html
index 5d13e28e7..7ed90c2ec 100644
--- a/src/registrar/templates/domain_senior_official.html
+++ b/src/registrar/templates/domain_senior_official.html
@@ -4,45 +4,9 @@
 {% block title %}Senior official | {{ domain.name }} | {% endblock %}
 
 {% block domain_content %}
-  {# this is right after the messages block in the parent template #}
-  {% include "includes/form_errors.html" with form=form %}
-
-  <h1>Senior official</h1>
-
-  <p>Your senior official is a person within your organization who can
-  authorize domain requests. This person must be in a role of significant, executive responsibility within the organization. Read more about <a class="usa-link" rel="noopener noreferrer" target="_blank" href="{% public_site_url 'domains/eligibility/#you-must-have-approval-from-a-senior-official-within-your-organization' %}">who can serve as a senior official</a>.</p>
-  
   {% if generic_org_type == "federal" or generic_org_type == "tribal" %}
-    <p>
-      The senior official for your organization can’t be updated here.
-      To suggest an update, email <a href="mailto:help@get.gov" class="usa-link">help@get.gov</a>.
-    </p>
+    {% include "includes/senior_official.html" with can_edit=False include_read_more_text=True %}
   {% else %}
-  {% include "includes/required_fields.html" %}
+    {% include "includes/senior_official.html" with can_edit=True include_read_more_text=True %}
   {% endif %}
-  
-
-  <form class="usa-form usa-form--large" method="post" novalidate id="form-container">
-    {% csrf_token %}
-
-    {% if generic_org_type == "federal" or generic_org_type == "tribal" %}
-    {# If all fields are disabled, add SR content #}
-    <div class="usa-sr-only" aria-labelledby="id_first_name" id="sr-so-first-name">{{ form.first_name.value }}</div>
-    <div class="usa-sr-only" aria-labelledby="id_last_name" id="sr-so-last-name">{{ form.last_name.value }}</div>
-    <div class="usa-sr-only" aria-labelledby="id_title" id="sr-so-title">{{ form.title.value }}</div>
-    <div class="usa-sr-only" aria-labelledby="id_email" id="sr-so-email">{{ form.email.value }}</div>
-    {% endif %}
-
-    {% input_with_errors form.first_name %}
-
-    {% input_with_errors form.last_name %}
-
-    {% input_with_errors form.title %}
-
-    {% input_with_errors form.email %}
-    
-    {% if generic_org_type != "federal" and generic_org_type != "tribal" %}
-    <button type="submit" class="usa-button">Save</button>
-    {% endif %}
-  </form>
-{% endblock %}  {# domain_content #}
+{% endblock %}
diff --git a/src/registrar/templates/emails/action_needed_reasons/already_has_domains.txt b/src/registrar/templates/emails/action_needed_reasons/already_has_domains.txt
index 264fe265b..b1b3b0a1c 100644
--- a/src/registrar/templates/emails/action_needed_reasons/already_has_domains.txt
+++ b/src/registrar/templates/emails/action_needed_reasons/already_has_domains.txt
@@ -47,5 +47,5 @@ The .gov team
 Contact us: <https://get.gov/contact/>
 Learn about .gov <https://get.gov>
 
-The .gov registry is a part of the Cybersecurity and Infrastructure Security Agency (CISA) <http://cisa.gov/>
-{% endautoescape %}
\ No newline at end of file
+The .gov registry is a part of the Cybersecurity and Infrastructure Security Agency (CISA) <https://cisa.gov/>
+{% endautoescape %}
diff --git a/src/registrar/templates/emails/action_needed_reasons/bad_name.txt b/src/registrar/templates/emails/action_needed_reasons/bad_name.txt
index 95967639c..7d088aa4e 100644
--- a/src/registrar/templates/emails/action_needed_reasons/bad_name.txt
+++ b/src/registrar/templates/emails/action_needed_reasons/bad_name.txt
@@ -30,5 +30,5 @@ The .gov team
 Contact us: <https://get.gov/contact/>
 Learn about .gov <https://get.gov>
 
-The .gov registry is a part of the Cybersecurity and Infrastructure Security Agency (CISA) <http://cisa.gov/>
-{% endautoescape %}
\ No newline at end of file
+The .gov registry is a part of the Cybersecurity and Infrastructure Security Agency (CISA) <https://cisa.gov/>
+{% endautoescape %}
diff --git a/src/registrar/templates/emails/action_needed_reasons/eligibility_unclear.txt b/src/registrar/templates/emails/action_needed_reasons/eligibility_unclear.txt
index 280321045..d3a986183 100644
--- a/src/registrar/templates/emails/action_needed_reasons/eligibility_unclear.txt
+++ b/src/registrar/templates/emails/action_needed_reasons/eligibility_unclear.txt
@@ -31,5 +31,5 @@ The .gov team
 Contact us: <https://get.gov/contact/>
 Learn about .gov <https://get.gov>
 
-The .gov registry is a part of the Cybersecurity and Infrastructure Security Agency (CISA) <http://cisa.gov/>
-{% endautoescape %}
\ No newline at end of file
+The .gov registry is a part of the Cybersecurity and Infrastructure Security Agency (CISA) <https://cisa.gov/>
+{% endautoescape %}
diff --git a/src/registrar/templates/emails/action_needed_reasons/questionable_senior_official.txt b/src/registrar/templates/emails/action_needed_reasons/questionable_senior_official.txt
index 94e15b78c..e20e4cb60 100644
--- a/src/registrar/templates/emails/action_needed_reasons/questionable_senior_official.txt
+++ b/src/registrar/templates/emails/action_needed_reasons/questionable_senior_official.txt
@@ -32,5 +32,5 @@ The .gov team
 Contact us: <https://get.gov/contact/>
 Learn about .gov <https://get.gov>
 
-The .gov registry is a part of the Cybersecurity and Infrastructure Security Agency (CISA) <http://cisa.gov/>
-{% endautoescape %}
\ No newline at end of file
+The .gov registry is a part of the Cybersecurity and Infrastructure Security Agency (CISA) <https://cisa.gov/>
+{% endautoescape %}
diff --git a/src/registrar/templates/emails/domain_invitation.txt b/src/registrar/templates/emails/domain_invitation.txt
index e426ae6ef..068040205 100644
--- a/src/registrar/templates/emails/domain_invitation.txt
+++ b/src/registrar/templates/emails/domain_invitation.txt
@@ -38,5 +38,5 @@ The .gov team
 Contact us: <https://get.gov/contact/>
 Learn about .gov <https://get.gov>
 
-The .gov registry is a part of the Cybersecurity and Infrastructure Security Agency (CISA) <http://cisa.gov/>
+The .gov registry is a part of the Cybersecurity and Infrastructure Security Agency (CISA) <https://cisa.gov/>
 {% endautoescape %}
diff --git a/src/registrar/templates/emails/domain_request_withdrawn.txt b/src/registrar/templates/emails/domain_request_withdrawn.txt
index 0c061c53c..6efa92d64 100644
--- a/src/registrar/templates/emails/domain_request_withdrawn.txt
+++ b/src/registrar/templates/emails/domain_request_withdrawn.txt
@@ -26,5 +26,5 @@ The .gov team
 Contact us: <https://get.gov/contact/>
 Learn about .gov <https://get.gov>
 
-The .gov registry is a part of the Cybersecurity and Infrastructure Security Agency (CISA) <http://cisa.gov/>
+The .gov registry is a part of the Cybersecurity and Infrastructure Security Agency (CISA) <https://cisa.gov/>
 {% endautoescape %}
diff --git a/src/registrar/templates/emails/status_change_approved.txt b/src/registrar/templates/emails/status_change_approved.txt
index bbef8c81a..70f813599 100644
--- a/src/registrar/templates/emails/status_change_approved.txt
+++ b/src/registrar/templates/emails/status_change_approved.txt
@@ -49,5 +49,5 @@ The .gov team
 Contact us: <https://get.gov/contact/>
 Learn about .gov <https://get.gov>
 
-The .gov registry is a part of the Cybersecurity and Infrastructure Security Agency (CISA) <http://cisa.gov/>
+The .gov registry is a part of the Cybersecurity and Infrastructure Security Agency (CISA) <https://cisa.gov/>
 {% endautoescape %}
diff --git a/src/registrar/templates/emails/status_change_rejected.txt b/src/registrar/templates/emails/status_change_rejected.txt
index 12693deb9..2fcbb1d83 100644
--- a/src/registrar/templates/emails/status_change_rejected.txt
+++ b/src/registrar/templates/emails/status_change_rejected.txt
@@ -77,5 +77,5 @@ The .gov team
 Contact us: <https://get.gov/contact/>
 Learn about .gov <https://get.gov>
 
-The .gov registry is a part of the Cybersecurity and Infrastructure Security Agency (CISA) <http://cisa.gov/>
+The .gov registry is a part of the Cybersecurity and Infrastructure Security Agency (CISA) <https://cisa.gov/>
 {% endautoescape %}
diff --git a/src/registrar/templates/emails/submission_confirmation.txt b/src/registrar/templates/emails/submission_confirmation.txt
index 2dd4387a4..740e6f393 100644
--- a/src/registrar/templates/emails/submission_confirmation.txt
+++ b/src/registrar/templates/emails/submission_confirmation.txt
@@ -38,5 +38,5 @@ The .gov team
 Contact us: <https://get.gov/contact/>
 Learn about .gov <https://get.gov>
 
-The .gov registry is a part of the Cybersecurity and Infrastructure Security Agency (CISA) <http://cisa.gov/>
+The .gov registry is a part of the Cybersecurity and Infrastructure Security Agency (CISA) <https://cisa.gov/>
 {% endautoescape %}
diff --git a/src/registrar/templates/emails/transition_domain_invitation.txt b/src/registrar/templates/emails/transition_domain_invitation.txt
index bdce7d107..b6773d9e9 100644
--- a/src/registrar/templates/emails/transition_domain_invitation.txt
+++ b/src/registrar/templates/emails/transition_domain_invitation.txt
@@ -60,5 +60,5 @@ The .gov team
 Domain management <https://manage.get.gov>
 Get.gov <https://get.gov>
 
-The .gov registry is a part of the Cybersecurity and Infrastructure Security Agency (CISA) <http://cisa.gov/>
+The .gov registry is a part of the Cybersecurity and Infrastructure Security Agency (CISA) <https://cisa.gov/>
 {% endautoescape %}
diff --git a/src/registrar/templates/includes/senior_official.html b/src/registrar/templates/includes/senior_official.html
new file mode 100644
index 000000000..fda97b6a9
--- /dev/null
+++ b/src/registrar/templates/includes/senior_official.html
@@ -0,0 +1,49 @@
+{% load static field_helpers url_helpers %}
+
+{% if can_edit %}
+    {% include "includes/form_errors.html" with form=form %}
+{% endif %}
+
+<h1>Senior Official</h1>
+
+<p>
+    Your senior official is a person within your organization who can authorize domain requests.
+    {% if include_read_more_text %} 
+    This person must be in a role of significant, executive responsibility within the organization.
+    Read more about <a class="usa-link" rel="noopener noreferrer" target="_blank" href="{% public_site_url 'domains/eligibility/#you-must-have-approval-from-a-senior-official-within-your-organization' %}">who can serve as a senior official</a>.
+    {% endif %}
+</p>
+
+{% if can_edit %}
+    {% include "includes/required_fields.html" %}
+{% else %}
+    <p>
+        The senior official for your organization can’t be updated here. 
+        To suggest an update, email <a href="mailto:help@get.gov" class="usa-link">help@get.gov</a>.
+    </p>
+{% endif %}
+
+{% if can_edit %}
+    <form class="usa-form usa-form--large" method="post" novalidate id="form-container">
+        {% csrf_token %}
+        {% input_with_errors form.first_name %}
+        {% input_with_errors form.last_name %}
+        {% input_with_errors form.title %}
+        {% input_with_errors form.email %}
+        <button type="submit" class="usa-button">Save</button>
+    </form>
+{% elif not form.full_name.value and not form.title.value and not form.email.value %}
+    <h4>No senior official was found.</h4>
+{% else %}
+    {% if form.full_name.value is not None %}
+        {% include "includes/input_read_only.html" with field=form.full_name %}
+    {% endif %}
+
+    {% if form.title.value is not None %}
+        {% include "includes/input_read_only.html" with field=form.title %}
+    {% endif %}
+
+    {% if form.email.value is not None %}
+        {% include "includes/input_read_only.html" with field=form.email %}
+    {% endif %}
+{% endif %}
diff --git a/src/registrar/templates/includes/summary_item.html b/src/registrar/templates/includes/summary_item.html
index 6ec69b770..f69bbaf96 100644
--- a/src/registrar/templates/includes/summary_item.html
+++ b/src/registrar/templates/includes/summary_item.html
@@ -7,7 +7,7 @@
     {% if heading_level %}
       <{{ heading_level }}
     {% else %} 
-      <h2
+      <h3
     {% endif %} 
       class="summary-item__title
              font-sans-md
@@ -19,10 +19,10 @@
     {% if heading_level %}
       </{{ heading_level }}>
     {% else %} 
-      </h2>
+      </h3>
     {% endif %}
       {% if sub_header_text %}
-        <h3 class="register-form-review-header">{{ sub_header_text }}</h3>
+        <h4 class="register-form-review-header">{{ sub_header_text }}</h4>
       {% endif %}
       {% if address %}
         {% include "includes/organization_address.html" with organization=value %}
diff --git a/src/registrar/templates/portfolio_organization_sidebar.html b/src/registrar/templates/portfolio_organization_sidebar.html
index cfcdff3a8..cfbb30e91 100644
--- a/src/registrar/templates/portfolio_organization_sidebar.html
+++ b/src/registrar/templates/portfolio_organization_sidebar.html
@@ -13,7 +13,9 @@
       </li>
 
       <li class="usa-sidenav__item">
-        <a href="#"
+        {% url 'senior-official' as url %} 
+        <a href="{{ url }}"
+        {% if request.path == url %}class="usa-current"{% endif %}
         >
             Senior official
         </a>
diff --git a/src/registrar/templates/portfolio_senior_official.html b/src/registrar/templates/portfolio_senior_official.html
new file mode 100644
index 000000000..5c47e1645
--- /dev/null
+++ b/src/registrar/templates/portfolio_senior_official.html
@@ -0,0 +1,24 @@
+{% extends 'portfolio_base.html' %}
+{% load static field_helpers%}
+
+{% block title %}Senior Official | {{ portfolio.name }} | {% endblock %}
+
+{% load static %}
+
+{% block portfolio_content %}
+<div class="grid-row grid-gap">
+    <div class="tablet:grid-col-3">
+        <p class="font-body-md margin-top-0 margin-bottom-2
+                    text-primary-darker text-semibold"
+        >
+            <span class="usa-sr-only"> Portfolio name:</span> {{ portfolio }}
+        </p>
+
+        {% include 'portfolio_organization_sidebar.html' %}
+    </div>
+
+    <div class="tablet:grid-col-9">
+        {% include "includes/senior_official.html" with can_edit=False %}
+    </div>
+</div>
+{% endblock %}
diff --git a/src/registrar/tests/test_models.py b/src/registrar/tests/test_models.py
index 8c69517e9..5167aac99 100644
--- a/src/registrar/tests/test_models.py
+++ b/src/registrar/tests/test_models.py
@@ -1,3 +1,4 @@
+from django.forms import ValidationError
 from django.test import TestCase
 from django.db.utils import IntegrityError
 from django.db import transaction
@@ -1348,6 +1349,7 @@ class TestUser(TestCase):
         self.user.phone = None
         self.assertFalse(self.user.has_contact_info())
 
+    @less_console_noise_decorator
     def test_has_portfolio_permission(self):
         """
         0. Returns False when user does not have a permission
@@ -1401,6 +1403,37 @@ class TestUser(TestCase):
 
         Portfolio.objects.all().delete()
 
+    @less_console_noise_decorator
+    def test_user_with_portfolio_but_no_roles(self):
+        # Create an instance of User with a portfolio but no roles or additional permissions
+        portfolio, _ = Portfolio.objects.get_or_create(creator=self.user, organization_name="Hotel California")
+
+        self.user.portfolio = portfolio
+        self.user.portfolio_roles = []
+
+        # Test if the ValidationError is raised with the correct message
+        with self.assertRaises(ValidationError) as cm:
+            self.user.clean()
+
+        self.assertEqual(
+            cm.exception.message, "When portfolio is assigned, portfolio roles or additional permissions are required."
+        )
+        Portfolio.objects.all().delete()
+
+    @less_console_noise_decorator
+    def test_user_with_portfolio_roles_but_no_portfolio(self):
+        # Create an instance of User with a portfolio role but no portfolio
+        self.user.portfolio = None
+        self.user.portfolio_roles = [UserPortfolioRoleChoices.ORGANIZATION_ADMIN]
+
+        # Test if the ValidationError is raised with the correct message
+        with self.assertRaises(ValidationError) as cm:
+            self.user.clean()
+
+        self.assertEqual(
+            cm.exception.message, "When portfolio roles or additional permissions are assigned, portfolio is required."
+        )
+
 
 class TestContact(TestCase):
     @less_console_noise_decorator
diff --git a/src/registrar/tests/test_views_domain.py b/src/registrar/tests/test_views_domain.py
index 63a1651d6..3a90543a2 100644
--- a/src/registrar/tests/test_views_domain.py
+++ b/src/registrar/tests/test_views_domain.py
@@ -1128,7 +1128,7 @@ class TestDomainSeniorOfficial(TestDomainOverview):
     def test_domain_senior_official(self):
         """Can load domain's senior official page."""
         page = self.client.get(reverse("domain-senior-official", kwargs={"pk": self.domain.id}))
-        self.assertContains(page, "Senior official", count=14)
+        self.assertContains(page, "Senior official", count=3)
 
     @less_console_noise_decorator
     def test_domain_senior_official_content(self):
@@ -1192,14 +1192,14 @@ class TestDomainSeniorOfficial(TestDomainOverview):
                     self.assertTrue("disabled" in form[field_name].attrs)
 
     @less_console_noise_decorator
-    def test_domain_edit_senior_official_federal(self):
+    def test_domain_cannot_edit_senior_official_when_federal(self):
         """Tests that no edit can occur when the underlying domain is federal"""
 
         # Set the org type to federal
         self.domain_information.generic_org_type = DomainInformation.OrganizationChoices.FEDERAL
         self.domain_information.save()
 
-        # Add an SO. We can do this at the model level, just not the form level.
+        # Add an SO
         self.domain_information.senior_official = Contact(
             first_name="Apple", last_name="Tester", title="CIO", email="nobody@igorville.gov"
         )
@@ -1207,49 +1207,13 @@ class TestDomainSeniorOfficial(TestDomainOverview):
         self.domain_information.save()
 
         so_page = self.app.get(reverse("domain-senior-official", kwargs={"pk": self.domain.id}))
-        session_id = self.app.cookies[settings.SESSION_COOKIE_NAME]
-        self.app.set_cookie(settings.SESSION_COOKIE_NAME, session_id)
-
-        # Test if the form is populating data correctly
-        so_form = so_page.forms[0]
-
-        test_cases = [
-            ("first_name", "Apple"),
-            ("last_name", "Tester"),
-            ("title", "CIO"),
-            ("email", "nobody@igorville.gov"),
-        ]
-        self.assert_all_form_fields_have_expected_values(so_form, test_cases, test_for_disabled=True)
-
-        # Attempt to change data on each field. Because this domain is federal,
-        # this should not succeed.
-        so_form["first_name"] = "Orange"
-        so_form["last_name"] = "Smoothie"
-        so_form["title"] = "Cat"
-        so_form["email"] = "somebody@igorville.gov"
-
-        submission = so_form.submit()
-
-        # A 302 indicates this page underwent a redirect.
-        self.assertEqual(submission.status_code, 302)
-
-        followed_submission = submission.follow()
-
-        # Test the returned form for data accuracy. These values should be unchanged.
-        new_form = followed_submission.forms[0]
-        self.assert_all_form_fields_have_expected_values(new_form, test_cases, test_for_disabled=True)
-
-        # refresh domain information. Test these values in the DB.
-        self.domain_information.refresh_from_db()
-
-        # All values should be unchanged. These are defined manually for code clarity.
-        self.assertEqual("Apple", self.domain_information.senior_official.first_name)
-        self.assertEqual("Tester", self.domain_information.senior_official.last_name)
-        self.assertEqual("CIO", self.domain_information.senior_official.title)
-        self.assertEqual("nobody@igorville.gov", self.domain_information.senior_official.email)
+        self.assertContains(so_page, "Apple Tester")
+        self.assertContains(so_page, "CIO")
+        self.assertContains(so_page, "nobody@igorville.gov")
+        self.assertNotContains(so_page, "Save")
 
     @less_console_noise_decorator
-    def test_domain_edit_senior_official_tribal(self):
+    def test_domain_cannot_edit_senior_official_tribal(self):
         """Tests that no edit can occur when the underlying domain is tribal"""
 
         # Set the org type to federal
@@ -1264,46 +1228,10 @@ class TestDomainSeniorOfficial(TestDomainOverview):
         self.domain_information.save()
 
         so_page = self.app.get(reverse("domain-senior-official", kwargs={"pk": self.domain.id}))
-        session_id = self.app.cookies[settings.SESSION_COOKIE_NAME]
-        self.app.set_cookie(settings.SESSION_COOKIE_NAME, session_id)
-
-        # Test if the form is populating data correctly
-        so_form = so_page.forms[0]
-
-        test_cases = [
-            ("first_name", "Apple"),
-            ("last_name", "Tester"),
-            ("title", "CIO"),
-            ("email", "nobody@igorville.gov"),
-        ]
-        self.assert_all_form_fields_have_expected_values(so_form, test_cases, test_for_disabled=True)
-
-        # Attempt to change data on each field. Because this domain is federal,
-        # this should not succeed.
-        so_form["first_name"] = "Orange"
-        so_form["last_name"] = "Smoothie"
-        so_form["title"] = "Cat"
-        so_form["email"] = "somebody@igorville.gov"
-
-        submission = so_form.submit()
-
-        # A 302 indicates this page underwent a redirect.
-        self.assertEqual(submission.status_code, 302)
-
-        followed_submission = submission.follow()
-
-        # Test the returned form for data accuracy. These values should be unchanged.
-        new_form = followed_submission.forms[0]
-        self.assert_all_form_fields_have_expected_values(new_form, test_cases, test_for_disabled=True)
-
-        # refresh domain information. Test these values in the DB.
-        self.domain_information.refresh_from_db()
-
-        # All values should be unchanged. These are defined manually for code clarity.
-        self.assertEqual("Apple", self.domain_information.senior_official.first_name)
-        self.assertEqual("Tester", self.domain_information.senior_official.last_name)
-        self.assertEqual("CIO", self.domain_information.senior_official.title)
-        self.assertEqual("nobody@igorville.gov", self.domain_information.senior_official.email)
+        self.assertContains(so_page, "Apple Tester")
+        self.assertContains(so_page, "CIO")
+        self.assertContains(so_page, "nobody@igorville.gov")
+        self.assertNotContains(so_page, "Save")
 
     @less_console_noise_decorator
     def test_domain_edit_senior_official_creates_new(self):
diff --git a/src/registrar/tests/test_views_portfolio.py b/src/registrar/tests/test_views_portfolio.py
index f72130d94..60764cf1c 100644
--- a/src/registrar/tests/test_views_portfolio.py
+++ b/src/registrar/tests/test_views_portfolio.py
@@ -1,7 +1,7 @@
 from django.urls import reverse
 from api.tests.common import less_console_noise_decorator
 from registrar.config import settings
-from registrar.models.portfolio import Portfolio
+from registrar.models import Portfolio, SeniorOfficial
 from django_webtest import WebTest  # type: ignore
 from registrar.models import (
     DomainRequest,
@@ -38,6 +38,36 @@ class TestPortfolio(WebTest):
         User.objects.all().delete()
         super().tearDown()
 
+    @less_console_noise_decorator
+    @override_flag("organization_feature", active=True)
+    def test_portfolio_senior_official(self):
+        """Tests that the senior official page on portfolio contains the content we expect"""
+        self.app.set_user(self.user.username)
+
+        so = SeniorOfficial.objects.create(
+            first_name="Saturn", last_name="Enceladus", title="Planet/Moon", email="spacedivision@igorville.com"
+        )
+
+        self.portfolio.senior_official = so
+        self.portfolio.save()
+        self.portfolio.refresh_from_db()
+
+        self.user.portfolio = self.portfolio
+        self.user.portfolio_additional_permissions = [UserPortfolioPermissionChoices.VIEW_PORTFOLIO]
+        self.user.save()
+        self.user.refresh_from_db()
+
+        so_portfolio_page = self.app.get(reverse("senior-official"))
+        # Assert that we're on the right page
+        self.assertContains(so_portfolio_page, "Senior official")
+        self.assertContains(so_portfolio_page, "Saturn Enceladus")
+        self.assertContains(so_portfolio_page, "Planet/Moon")
+        self.assertContains(so_portfolio_page, "spacedivision@igorville.com")
+        self.assertNotContains(so_portfolio_page, "Save")
+
+        self.portfolio.delete()
+        so.delete()
+
     @less_console_noise_decorator
     def test_middleware_does_not_redirect_if_no_permission(self):
         """Test that user with no portfolio permission is not redirected when attempting to access home"""
diff --git a/src/registrar/views/portfolios.py b/src/registrar/views/portfolios.py
index 1956cf544..8a5321cc9 100644
--- a/src/registrar/views/portfolios.py
+++ b/src/registrar/views/portfolios.py
@@ -3,7 +3,7 @@ from django.http import Http404
 from django.shortcuts import render
 from django.urls import reverse
 from django.contrib import messages
-from registrar.forms.portfolio import PortfolioOrgAddressForm
+from registrar.forms.portfolio import PortfolioOrgAddressForm, PortfolioSeniorOfficialForm
 from registrar.models.portfolio import Portfolio
 from registrar.views.utility.permission_views import (
     PortfolioDomainRequestsPermissionView,
@@ -97,3 +97,34 @@ class PortfolioOrganizationView(PortfolioBasePermissionView, FormMixin):
     def get_success_url(self):
         """Redirect to the overview page for the portfolio."""
         return reverse("organization")
+
+
+class PortfolioSeniorOfficialView(PortfolioBasePermissionView, FormMixin):
+    """
+    View to handle displaying and updating the portfolio's senior official details.
+    For now, this view is readonly.
+    """
+
+    model = Portfolio
+    template_name = "portfolio_senior_official.html"
+    form_class = PortfolioSeniorOfficialForm
+    context_object_name = "portfolio"
+
+    def get_object(self, queryset=None):
+        """Get the portfolio object based on the request user."""
+        portfolio = self.request.user.portfolio
+        if portfolio is None:
+            raise Http404("No organization found for this user")
+        return portfolio
+
+    def get_form_kwargs(self):
+        """Include the instance in the form kwargs."""
+        kwargs = super().get_form_kwargs()
+        kwargs["instance"] = self.get_object().senior_official
+        return kwargs
+
+    def get(self, request, *args, **kwargs):
+        """Handle GET requests to display the form."""
+        self.object = self.get_object()
+        form = self.get_form()
+        return self.render_to_response(self.get_context_data(form=form))
diff --git a/src/zap.conf b/src/zap.conf
index d6d22995c..c97897aeb 100644
--- a/src/zap.conf
+++ b/src/zap.conf
@@ -71,6 +71,7 @@
 10038	OUTOFSCOPE	http://app:8080/domain_requests/
 10038	OUTOFSCOPE	http://app:8080/domains/
 10038	OUTOFSCOPE	http://app:8080/organization/
+10038	OUTOFSCOPE	http://app:8080/suborganization/
 # This URL always returns 404, so include it as well.
 10038	OUTOFSCOPE	http://app:8080/todo
 # OIDC isn't configured in the test environment and DEBUG=True so this gives a 500 without CSP headers