diff --git a/warehouse/oidc/views.py b/warehouse/oidc/views.py
index fd58e2cee320..4ca3d009f00a 100644
--- a/warehouse/oidc/views.py
+++ b/warehouse/oidc/views.py
@@ -29,7 +29,6 @@
     OIDC_ISSUER_SERVICE_NAMES,
     lookup_custom_issuer_type,
 )
-from warehouse.organizations.models import OrganizationProject
 from warehouse.packaging.interfaces import IProjectService
 from warehouse.packaging.models import ProjectFactory
 from warehouse.rate_limiting.interfaces import IRateLimiter
@@ -218,32 +217,14 @@ def mint_token(
             # Try creating the new project
             project_service = request.find_service(IProjectService)
             try:
-                # Check if this pending publisher is for an organization
-                if pending_publisher.organization_id:
-                    # For organization-owned projects,
-                    # create without making the user an owner
-                    new_project = project_service.create_project(
-                        pending_publisher.project_name,
-                        pending_publisher.added_by,
-                        request,
-                        creator_is_owner=False,
-                        ratelimited=False,
-                    )
-                    # Add the project to the organization
-                    request.db.add(
-                        OrganizationProject(
-                            organization_id=pending_publisher.organization_id,
-                            project_id=new_project.id,
-                        )
-                    )
-                else:
-                    # For user-owned projects, create normally
-                    new_project = project_service.create_project(
-                        pending_publisher.project_name,
-                        pending_publisher.added_by,
-                        request,
-                        ratelimited=False,
-                    )
+                new_project = project_service.create_project(
+                    pending_publisher.project_name,
+                    pending_publisher.added_by,
+                    request,
+                    creator_is_owner=pending_publisher.organization_id is None,
+                    ratelimited=False,
+                    organization_id=pending_publisher.organization_id,
+                )
             except HTTPException as exc:
                 return _invalid(
                     errors=[{"code": "invalid-payload", "description": str(exc)}],
diff --git a/warehouse/packaging/interfaces.py b/warehouse/packaging/interfaces.py
index 739a3f60e835..a6fd4d21fc1e 100644
--- a/warehouse/packaging/interfaces.py
+++ b/warehouse/packaging/interfaces.py
@@ -9,6 +9,8 @@
 from warehouse.rate_limiting.interfaces import RateLimiterException
 
 if typing.TYPE_CHECKING:
+    from uuid import UUID
+
     from warehouse.packaging.models import Project
 
 
@@ -76,7 +78,14 @@ def check_project_name(name):
         Check if a project name is valid and available for use.
         """
 
-    def create_project(name, creator, request, *, creator_is_owner=True):
+    def create_project(
+        name,
+        creator,
+        request,
+        *,
+        creator_is_owner=True,
+        organization_id: UUID | None = None,
+    ):
         """
         Creates a new project, recording a user as its creator.
 
diff --git a/warehouse/packaging/services.py b/warehouse/packaging/services.py
index 2fb97d16cb47..cd685c18dfb3 100644
--- a/warehouse/packaging/services.py
+++ b/warehouse/packaging/services.py
@@ -30,6 +30,7 @@
 from warehouse.helpdesk.interfaces import IAdminNotificationService
 from warehouse.metrics import IMetricsService
 from warehouse.oidc.models import PendingOIDCPublisher
+from warehouse.organizations.models import OrganizationProject
 from warehouse.packaging.interfaces import (
     IDocsStorage,
     IFileStorage,
@@ -494,7 +495,14 @@ def check_project_name(self, name: str) -> None:
         return None
 
     def create_project(
-        self, name, creator, request, *, creator_is_owner=True, ratelimited=True
+        self,
+        name,
+        creator,
+        request,
+        *,
+        creator_is_owner=True,
+        ratelimited=True,
+        organization_id=None,
     ):
         if ratelimited:
             self._check_ratelimits(request, creator)
@@ -640,6 +648,7 @@ def create_project(
         # The project name is valid: create it and add it
         project = Project(name=name)
         self.db.add(project)
+        self.db.flush()  # To get the new ID
 
         # TODO: This should be handled by some sort of database trigger or a
         #       SQLAlchemy hook or the like instead of doing it inline in this
@@ -657,8 +666,15 @@ def create_project(
             additional={"created_by": creator.username},
         )
 
-        # Mark the creator as the newly created project's owner, if configured.
-        if creator_is_owner:
+        if organization_id:
+            # If an organization ID is provided, we never set the creator to owner
+            self.db.add(
+                OrganizationProject(
+                    organization_id=organization_id, project_id=project.id
+                )
+            )
+        elif creator_is_owner:
+            # Mark the creator as the newly created project's owner, if configured.
             self.db.add(Role(user=creator, project=project, role_name="Owner"))
             # TODO: This should be handled by some sort of database trigger or a
             #       SQLAlchemy hook or the like instead of doing it inline in this