diff --git a/lms/services/assignment.py b/lms/services/assignment.py
index 4b56dfc997..c281c86ffd 100644
--- a/lms/services/assignment.py
+++ b/lms/services/assignment.py
@@ -11,6 +11,9 @@
     AutoGradingConfig,
     Course,
     Grouping,
+    LMSUser,
+    LMSUserAssignmentMembership,
+    LTIParams,
     LTIRole,
     User,
 )
@@ -182,7 +185,11 @@ def get_assignment_for_launch(self, request, course: Course) -> Assignment | Non
         )
 
     def upsert_assignment_membership(
-        self, assignment: Assignment, user: User, lti_roles: list[LTIRole]
+        self,
+        lti_params: LTIParams,
+        assignment: Assignment,
+        user: User,
+        lti_roles: list[LTIRole],
     ) -> list[AssignmentMembership]:
         """Store details of the roles a user plays in an assignment."""
 
@@ -198,6 +205,10 @@ def upsert_assignment_membership(
             for lti_role in lti_roles
         ]
 
+        self._upsert_lms_user_assignment_memberships(
+            lti_params, user.lms_user, assignment, lti_roles
+        )
+
         return list(
             bulk_upsert(
                 self._db,
@@ -208,6 +219,35 @@ def upsert_assignment_membership(
             )
         )
 
+    def _upsert_lms_user_assignment_memberships(
+        self,
+        lti_params,
+        lms_user: LMSUser,
+        assignment: Assignment,
+        lti_roles: list[LTIRole],
+    ) -> list[LMSUserAssignmentMembership]:
+        values = [
+            {
+                "lms_user_id": lms_user.id,
+                "assignment_id": assignment.id,
+                "lti_role_id": lti_role.id,
+                "lti_v11_lis_result_sourcedid": None
+                if lti_params.v13
+                else lti_params.get("lis_result_sourcedid"),
+            }
+            for lti_role in lti_roles
+        ]
+
+        return list(
+            bulk_upsert(
+                self._db,
+                model_class=LMSUserAssignmentMembership,
+                values=values,
+                index_elements=["lms_user_id", "assignment_id", "lti_role_id"],
+                update_columns=["updated", "lti_v11_lis_result_sourcedid"],
+            )
+        )
+
     def upsert_assignment_groupings(
         self, assignment: Assignment, groupings: list[Grouping]
     ) -> list[AssignmentGrouping]:
diff --git a/lms/views/lti/basic_launch.py b/lms/views/lti/basic_launch.py
index e79c6c396c..9a4f149d23 100644
--- a/lms/views/lti/basic_launch.py
+++ b/lms/views/lti/basic_launch.py
@@ -172,6 +172,7 @@ def _show_document(self, assignment):
 
         # Store the relationship between the assignment and the user
         self.assignment_service.upsert_assignment_membership(
+            lti_params=self.request.lti_params,
             assignment=assignment,
             user=self.request.user,
             lti_roles=self.request.lti_user.lti_roles,
diff --git a/tests/unit/lms/services/assignment_test.py b/tests/unit/lms/services/assignment_test.py
index 24dc17b7fc..832f9f5645 100644
--- a/tests/unit/lms/services/assignment_test.py
+++ b/tests/unit/lms/services/assignment_test.py
@@ -3,11 +3,13 @@
 
 import pytest
 from h_matchers import Any
+from sqlalchemy import select
 
 from lms.models import (
     AssignmentGrouping,
     AssignmentMembership,
     AutoGradingConfig,
+    LMSUserAssignmentMembership,
     RoleScope,
     RoleType,
 )
@@ -269,8 +271,11 @@ def test_get_assignment_created_assignments_point_to_copy(
         assert assignment.copied_from == sentinel.original_assignment
         assert assignment.document_url == sentinel.document_url
 
-    def test_upsert_assignment_membership(self, svc, assignment):
-        user = factories.User()
+    def test_upsert_assignment_membership(
+        self, svc, assignment, pyramid_request, db_session
+    ):
+        lms_user = factories.LMSUser()
+        user = factories.User(lms_user=lms_user)
         lti_roles = factories.LTIRole.create_batch(3)
         # One existing row
         factories.AssignmentMembership.create(
@@ -278,7 +283,10 @@ def test_upsert_assignment_membership(self, svc, assignment):
         )
 
         membership = svc.upsert_assignment_membership(
-            assignment=assignment, user=user, lti_roles=lti_roles
+            pyramid_request.lti_params,
+            assignment=assignment,
+            user=user,
+            lti_roles=lti_roles,
         )
         assert (
             membership
@@ -291,6 +299,21 @@ def test_upsert_assignment_membership(self, svc, assignment):
                 ]
             ).only()
         )
+        assert (
+            db_session.scalars(select(LMSUserAssignmentMembership)).all()
+            == Any.list.containing(
+                [
+                    Any.instance_of(LMSUserAssignmentMembership).with_attrs(
+                        {
+                            "lms_user": lms_user,
+                            "assignment": assignment,
+                            "lti_role": lti_role,
+                        }
+                    )
+                    for lti_role in lti_roles
+                ]
+            ).only()
+        )
 
     def test_upsert_assignment_grouping(self, svc, assignment, db_session):
         groupings = factories.CanvasGroup.create_batch(3)