diff --git a/src/registrar/utility/csv_export.py b/src/registrar/utility/csv_export.py
index 334742d17..dbd1bf5cb 100644
--- a/src/registrar/utility/csv_export.py
+++ b/src/registrar/utility/csv_export.py
@@ -18,6 +18,7 @@ from django.contrib.postgres.aggregates import StringAgg
 from registrar.models.utility.generic_helper import convert_queryset_to_dict
 from registrar.templatetags.custom_filters import get_region
 from registrar.utility.constants import BranchChoices
+from registrar.utility.enums import DefaultEmail
 
 
 logger = logging.getLogger(__name__)
@@ -371,6 +372,15 @@ class DomainExport(BaseExport):
         if domain_federal_type and domain_org_type == DomainRequest.OrgChoicesElectionOffice.FEDERAL:
             domain_type = f"{human_readable_domain_org_type} - {human_readable_domain_federal_type}"
 
+        security_contact_email = model.get("security_contact_email")
+        invalid_emails = {DefaultEmail.LEGACY_DEFAULT, DefaultEmail.PUBLIC_CONTACT_DEFAULT}
+        if (
+            not security_contact_email
+            or not isinstance(security_contact_email, str)
+            or security_contact_email.lower() in invalid_emails
+        ):
+            security_contact_email = "(blank)"
+
         # create a dictionary of fields which can be included in output.
         # "extra_fields" are precomputed fields (generated in the DB or parsed).
         FIELDS = {