diff --git a/src/registrar/context_processors.py b/src/registrar/context_processors.py
index 92a89ca02..ea04dca80 100644
--- a/src/registrar/context_processors.py
+++ b/src/registrar/context_processors.py
@@ -61,7 +61,7 @@ def add_has_profile_feature_flag_to_context(request):
 def portfolio_permissions(request):
     """Make portfolio permissions for the request user available in global context"""
     try:
-        portfolio = request.session["portfolio"] if "portfolio" in request.session else None
+        portfolio = request.session.get("portfolio")
         if portfolio:
             return {
                 "has_base_portfolio_permission": request.user.has_base_portfolio_permission(portfolio),
diff --git a/src/registrar/models/user.py b/src/registrar/models/user.py
index 8789a628b..c19778827 100644
--- a/src/registrar/models/user.py
+++ b/src/registrar/models/user.py
@@ -385,12 +385,12 @@ class User(AbstractUser):
 
     def is_org_user(self, request):
         has_organization_feature_flag = flag_is_active(request, "organization_feature")
-        portfolio = request.session["portfolio"] if "portfolio" in request.session else None
+        portfolio = request.session.get("portfolio")
         return has_organization_feature_flag and self.has_base_portfolio_permission(portfolio)
 
     def get_user_domain_ids(self, request):
         """Returns either the domains ids associated with this user on UserDomainRole or Portfolio"""
-        portfolio = request.session["portfolio"] if "portfolio" in request.session else None
+        portfolio = request.session.get("portfolio")
         if self.is_org_user(request) and self.has_view_all_domains_permission(portfolio):
             return DomainInformation.objects.filter(portfolio=portfolio).values_list(
                 "domain_id", flat=True
diff --git a/src/registrar/views/domain.py b/src/registrar/views/domain.py
index 7f31945f6..003f8dd0d 100644
--- a/src/registrar/views/domain.py
+++ b/src/registrar/views/domain.py
@@ -174,7 +174,7 @@ class DomainView(DomainBaseView):
         """Most views should not allow permission to portfolio users.
         If particular views allow permissions, they will need to override
         this function."""
-        portfolio = self.request.session["portfolio"] if "portfolio" in self.request.session else None
+        portfolio = self.request.session.get("portfolio")
         if self.request.user.has_domains_portfolio_permission(portfolio):
             if Domain.objects.filter(id=pk).exists():
                 domain = Domain.objects.get(id=pk)
@@ -237,7 +237,7 @@ class DomainOrgNameAddressView(DomainFormBaseView):
 
         # Org users shouldn't have access to this page
         is_org_user = self.request.user.is_org_user(self.request)
-        portfolio = self.request.session["portfolio"] if "portfolio" in self.request.session else None
+        portfolio = self.request.session.get("portfolio")
         if portfolio and is_org_user:
             return False
         else:
@@ -257,7 +257,7 @@ class DomainSubOrganizationView(DomainFormBaseView):
 
         # non-org users shouldn't have access to this page
         is_org_user = self.request.user.is_org_user(self.request)
-        portfolio = self.request.session["portfolio"] if "portfolio" in self.request.session else None
+        portfolio = self.request.session.get("portfolio")
         if portfolio and is_org_user:
             return super().has_permission()
         else:
@@ -338,7 +338,7 @@ class DomainSeniorOfficialView(DomainFormBaseView):
 
         # Org users shouldn't have access to this page
         is_org_user = self.request.user.is_org_user(self.request)
-        portfolio = self.request.session["portfolio"] if "portfolio" in self.request.session else None
+        portfolio = self.request.session.get("portfolio")
         if portfolio and is_org_user:
             return False
         else:
diff --git a/src/registrar/views/portfolios.py b/src/registrar/views/portfolios.py
index d3a6d6055..18285774b 100644
--- a/src/registrar/views/portfolios.py
+++ b/src/registrar/views/portfolios.py
@@ -51,7 +51,7 @@ class PortfolioOrganizationView(PortfolioBasePermissionView, FormMixin):
     def get_context_data(self, **kwargs):
         """Add additional context data to the template."""
         context = super().get_context_data(**kwargs)
-        portfolio = self.request.session["portfolio"] if "portfolio" in self.request.session else None
+        portfolio = self.request.session.get("portfolio")
         context["has_edit_org_portfolio_permission"] = self.request.user.has_edit_org_portfolio_permission(
             portfolio
         )
@@ -59,7 +59,7 @@ class PortfolioOrganizationView(PortfolioBasePermissionView, FormMixin):
 
     def get_object(self, queryset=None):
         """Get the portfolio object based on the session."""
-        portfolio = self.request.session["portfolio"] if "portfolio" in self.request.session else None
+        portfolio = self.request.session.get("portfolio")
         if portfolio is None:
             raise Http404("No organization found for this user")
         return portfolio
@@ -115,7 +115,7 @@ class PortfolioSeniorOfficialView(PortfolioBasePermissionView, FormMixin):
 
     def get_object(self, queryset=None):
         """Get the portfolio object based on the session."""
-        portfolio = self.request.session["portfolio"] if "portfolio" in self.request.session else None
+        portfolio = self.request.session.get("portfolio")
         if portfolio is None:
             raise Http404("No organization found for this user")
         return portfolio
diff --git a/src/registrar/views/utility/mixins.py b/src/registrar/views/utility/mixins.py
index 1f255f414..376912634 100644
--- a/src/registrar/views/utility/mixins.py
+++ b/src/registrar/views/utility/mixins.py
@@ -419,7 +419,7 @@ class PortfolioBasePermission(PermissionsLoginMixin):
         if not self.request.user.is_authenticated:
             return False
 
-        portfolio = self.request.session["portfolio"] if "portfolio" in self.request.session else None
+        portfolio = self.request.session.get("portfolio")
         return self.request.user.has_base_portfolio_permission(portfolio)
 
 
@@ -436,7 +436,7 @@ class PortfolioDomainsPermission(PortfolioBasePermission):
         if not self.request.user.is_authenticated:
             return False
         
-        portfolio = self.request.session["portfolio"] if "portfolio" in self.request.session else None
+        portfolio = self.request.session.get("portfolio")
         return self.request.user.has_domains_portfolio_permission(portfolio)
 
 
@@ -453,5 +453,5 @@ class PortfolioDomainRequestsPermission(PortfolioBasePermission):
         if not self.request.user.is_authenticated:
             return False
         
-        portfolio = self.request.session["portfolio"] if "portfolio" in self.request.session else None
+        portfolio = self.request.session.get("portfolio")
         return self.request.user.has_domain_requests_portfolio_permission(portfolio)