diff --git a/DigitalLearningSolutions.Data/DataServices/SupervisorDataService.cs b/DigitalLearningSolutions.Data/DataServices/SupervisorDataService.cs
index 6117fd8b65..d9256a472a 100644
--- a/DigitalLearningSolutions.Data/DataServices/SupervisorDataService.cs
+++ b/DigitalLearningSolutions.Data/DataServices/SupervisorDataService.cs
@@ -19,7 +19,7 @@ public interface ISupervisorDataService
         SupervisorDelegate GetSupervisorDelegate(int adminId, int delegateUserId);
         int? ValidateDelegate(int centreId, string delegateEmail);
         IEnumerable<DelegateSelfAssessment> GetSelfAssessmentsForSupervisorDelegateId(int supervisorDelegateId, int? adminIdCategoryId);
-        DelegateSelfAssessment? GetSelfAssessmentByCandidateAssessmentId(int candidateAssessmentId, int adminId);
+        DelegateSelfAssessment? GetSelfAssessmentByCandidateAssessmentId(int candidateAssessmentId, int adminId, int? adminIdCategoryId);
         IEnumerable<SupervisorDashboardToDoItem> GetSupervisorDashboardToDoItemsForRequestedSignOffs(int adminId);
         IEnumerable<SupervisorDashboardToDoItem> GetSupervisorDashboardToDoItemsForRequestedReviews(int adminId);
         DelegateSelfAssessment? GetSelfAssessmentBaseByCandidateAssessmentId(int candidateAssessmentId);
@@ -570,7 +570,7 @@ FROM SelfAssessmentResults AS sar2
                 );
         }
 
-        public DelegateSelfAssessment? GetSelfAssessmentByCandidateAssessmentId(int candidateAssessmentId, int adminId)
+        public DelegateSelfAssessment? GetSelfAssessmentByCandidateAssessmentId(int candidateAssessmentId, int adminId, int? adminIdCategoryId)
         {
             return connection.Query<DelegateSelfAssessment>(
                 @$"SELECT ca.ID, sa.ID AS SelfAssessmentID, sa.Name AS RoleName, sa.SupervisorSelfAssessmentReview, sa.SupervisorResultsReview, sa.ReviewerCommentsLabel, COALESCE (sasr.RoleName, 'Supervisor') AS SupervisorRoleTitle, ca.StartedDate, ca.LastAccessed, ca.CompleteByDate, ca.LaunchCount, ca.CompletedDate, r.RoleProfile, sg.SubGroup, pg.ProfessionalGroup, sa.SupervisorResultsReview AS IsSupervisorResultsReviewed,
@@ -590,8 +590,8 @@ FROM   CandidateAssessmentSupervisors AS cas INNER JOIN
                              NRPSubGroups AS sg ON sa.NRPSubGroupID = sg.ID LEFT OUTER JOIN
                              NRPRoles AS r ON sa.NRPRoleID = r.ID
                              LEFT OUTER JOIN SelfAssessmentSupervisorRoles AS sasr ON cas.SelfAssessmentSupervisorRoleID = sasr.ID
-                WHERE (ca.ID = @candidateAssessmentId) AND (cas.Removed IS NULL) AND (sd.SupervisorAdminID = @adminId)",
-                new { candidateAssessmentId, adminId }
+                WHERE (ca.ID = @candidateAssessmentId) AND (cas.Removed IS NULL) AND (sd.SupervisorAdminID = @adminId) AND (sa.CategoryID = @adminIdCategoryId)",
+                new { candidateAssessmentId, adminId, adminIdCategoryId }
                 ).FirstOrDefault();
         }
         public bool UpdateSelfAssessmentResultSupervisorVerifications(int selfAssessmentResultSupervisorVerificationId, string? comments, bool signedOff, int adminId)
diff --git a/DigitalLearningSolutions.Web.Tests/Controllers/SupervisorController/SupervisorControllerTests.cs b/DigitalLearningSolutions.Web.Tests/Controllers/SupervisorController/SupervisorControllerTests.cs
index c36ea57224..e34f4047d1 100644
--- a/DigitalLearningSolutions.Web.Tests/Controllers/SupervisorController/SupervisorControllerTests.cs
+++ b/DigitalLearningSolutions.Web.Tests/Controllers/SupervisorController/SupervisorControllerTests.cs
@@ -107,7 +107,8 @@ public void Setup()
                emailService,
                candidateAssessmentDownloadFileService,
                clockUtility,
-               pdfService
+               pdfService,
+               courseCategoriesService
            );
             controller.ControllerContext = new ControllerContext
             { HttpContext = new DefaultHttpContext { User = user } };
@@ -161,6 +162,7 @@ public void ReviewDelegateSelfAssessment_Should_Return_View_With_Optional_Compet
             // Given
             int candidateAssessmentId = 1;
             int supervisorDelegateId = 2;
+            int? adminIdCategoryId = 0;
             var superviseDelegate = SupervisorTagTestHelper.CreateDefaultSupervisorDelegateDetail();
             var delegateSelfAssessment = SupervisorTagTestHelper.CreateDefaultDelegateSelfAssessment();
             var appliedFilterViewModel = new List<AppliedFilterViewModel>();
@@ -190,7 +192,7 @@ public void ReviewDelegateSelfAssessment_Should_Return_View_With_Optional_Compet
 
             A.CallTo(() => supervisorService.GetSupervisorDelegateDetailsById(supervisorDelegateId, AdminId, 0))
                 .Returns(superviseDelegate);
-            A.CallTo(() => supervisorService.GetSelfAssessmentByCandidateAssessmentId(candidateAssessmentId, AdminId))
+            A.CallTo(() => supervisorService.GetSelfAssessmentByCandidateAssessmentId(candidateAssessmentId, AdminId, adminIdCategoryId))
                  .Returns(delegateSelfAssessment);
             A.CallTo(() => selfAssessmentService.GetMostRecentResults(SelfAssessmentId, DelegateUserId))
                 .Returns(competencies);
diff --git a/DigitalLearningSolutions.Web/Controllers/SupervisorController/Supervisor.cs b/DigitalLearningSolutions.Web/Controllers/SupervisorController/Supervisor.cs
index e571580587..c410800a19 100644
--- a/DigitalLearningSolutions.Web/Controllers/SupervisorController/Supervisor.cs
+++ b/DigitalLearningSolutions.Web/Controllers/SupervisorController/Supervisor.cs
@@ -355,12 +355,14 @@ public IActionResult AllStaffList()
         public IActionResult ReviewDelegateSelfAssessment(int supervisorDelegateId, int candidateAssessmentId, int? selfAssessmentResultId = null, SearchSupervisorCompetencyViewModel searchModel = null)
         {
             var adminId = GetAdminId();
+            var loggedInAdminUser = userService.GetAdminUserById(adminId);
             var superviseDelegate =
                 supervisorService.GetSupervisorDelegateDetailsById(supervisorDelegateId, GetAdminId(), 0);
             var reviewedCompetencies = PopulateCompetencyLevelDescriptors(
                 selfAssessmentService.GetCandidateAssessmentResultsById(candidateAssessmentId, adminId, selfAssessmentResultId).ToList()
             );
-            var delegateSelfAssessment = supervisorService.GetSelfAssessmentByCandidateAssessmentId(candidateAssessmentId, adminId);
+            var delegateSelfAssessment = supervisorService.GetSelfAssessmentByCandidateAssessmentId(candidateAssessmentId, adminId, loggedInAdminUser.CategoryId);
+            if (delegateSelfAssessment == null) return RedirectToAction("StatusCode", "LearningSolutions", new { code = 403 });
             var competencyIds = reviewedCompetencies.Select(c => c.Id).ToArray();
             var competencyFlags = frameworkService.GetSelectedCompetencyFlagsByCompetecyIds(competencyIds);
             var competencies = SupervisorCompetencyFilterHelper.FilterCompetencies(reviewedCompetencies, competencyFlags, searchModel);
@@ -375,7 +377,7 @@ public IActionResult ReviewDelegateSelfAssessment(int supervisorDelegateId, int
                 IsSupervisorResultsReviewed = delegateSelfAssessment.IsSupervisorResultsReviewed,
                 SearchViewModel = searchModel,
                 CandidateAssessmentId = candidateAssessmentId,
-                ExportToExcelHide = delegateSelfAssessment.SupervisorRoleTitle.Contains("Assessor"),
+                ExportToExcelHide = delegateSelfAssessment.SupervisorRoleTitle?.Contains("Assessor") ?? false,
             };
 
             var flags = frameworkService.GetSelectedCompetencyFlagsByCompetecyIds(reviewedCompetencies.Select(c => c.Id).ToArray());
diff --git a/DigitalLearningSolutions.Web/Services/SupervisorService.cs b/DigitalLearningSolutions.Web/Services/SupervisorService.cs
index 5848c758db..d6e4844155 100644
--- a/DigitalLearningSolutions.Web/Services/SupervisorService.cs
+++ b/DigitalLearningSolutions.Web/Services/SupervisorService.cs
@@ -16,7 +16,7 @@ public interface ISupervisorService
         SupervisorDelegate GetSupervisorDelegate(int adminId, int delegateUserId);
         int? ValidateDelegate(int centreId, string delegateEmail);
         IEnumerable<DelegateSelfAssessment> GetSelfAssessmentsForSupervisorDelegateId(int supervisorDelegateId, int? adminIdCategoryId);
-        DelegateSelfAssessment? GetSelfAssessmentByCandidateAssessmentId(int candidateAssessmentId, int adminId);
+        DelegateSelfAssessment? GetSelfAssessmentByCandidateAssessmentId(int candidateAssessmentId, int adminId, int? adminIdCategoryId);
         IEnumerable<SupervisorDashboardToDoItem> GetSupervisorDashboardToDoItemsForRequestedSignOffs(int adminId);
         IEnumerable<SupervisorDashboardToDoItem> GetSupervisorDashboardToDoItemsForRequestedReviews(int adminId);
         DelegateSelfAssessment? GetSelfAssessmentBaseByCandidateAssessmentId(int candidateAssessmentId);
@@ -117,9 +117,9 @@ public IEnumerable<SelfAssessmentSupervisorRole> GetDelegateNominatableSuperviso
             return supervisorDataService.GetSelfAssessmentBaseByCandidateAssessmentId(candidateAssessmentId);
         }
 
-        public DelegateSelfAssessment? GetSelfAssessmentByCandidateAssessmentId(int candidateAssessmentId, int adminId)
+        public DelegateSelfAssessment? GetSelfAssessmentByCandidateAssessmentId(int candidateAssessmentId, int adminId, int? adminIdCategoryId)
         {
-            return supervisorDataService.GetSelfAssessmentByCandidateAssessmentId(candidateAssessmentId, adminId);
+            return supervisorDataService.GetSelfAssessmentByCandidateAssessmentId(candidateAssessmentId, adminId, adminIdCategoryId);
         }
 
         public DelegateSelfAssessment? GetSelfAssessmentBySupervisorDelegateCandidateAssessmentId(int candidateAssessmentId, int supervisorDelegateId)