diff --git a/DigitalLearningSolutions.Data/DataServices/SelfAssessmentDataService/SelfAssessmentSupervisorDataService.cs b/DigitalLearningSolutions.Data/DataServices/SelfAssessmentDataService/SelfAssessmentSupervisorDataService.cs
index 88090f11a7..8ae5e54133 100644
--- a/DigitalLearningSolutions.Data/DataServices/SelfAssessmentDataService/SelfAssessmentSupervisorDataService.cs
+++ b/DigitalLearningSolutions.Data/DataServices/SelfAssessmentDataService/SelfAssessmentSupervisorDataService.cs
@@ -153,7 +153,7 @@ int delegateUserId
                         AND (sd.SupervisorAdminID IS NOT NULL) AND (coalesce(sasr.SelfAssessmentReview, 1) = 1)
                         AND (cas.ID NOT IN (SELECT CandidateAssessmentSupervisorID FROM CandidateAssessmentSupervisorVerifications WHERE Verified IS NULL))
                         AND au.Active = 1
-                        AND (au.CategoryID = 0 OR CategoryID IN (select CategoryID from SelfAssessments where ID = @selfAssessmentId))
+                        AND (au.CategoryID = 0 OR au.CategoryID IN (select CategoryID from SelfAssessments where ID = @selfAssessmentId))
                 ORDER BY SupervisorName",
                 new { selfAssessmentId, delegateUserId }
             );
diff --git a/DigitalLearningSolutions.Data/DataServices/SupervisorDataService.cs b/DigitalLearningSolutions.Data/DataServices/SupervisorDataService.cs
index ffd4c8385d..a73bf7285a 100644
--- a/DigitalLearningSolutions.Data/DataServices/SupervisorDataService.cs
+++ b/DigitalLearningSolutions.Data/DataServices/SupervisorDataService.cs
@@ -690,7 +690,7 @@ 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) AND (sa.CategoryID = @adminIdCategoryId)",
+                WHERE (ca.ID = @candidateAssessmentId) AND (cas.Removed IS NULL) AND (sd.SupervisorAdminID = @adminId) AND (ISNULL(@adminIdCategoryID, 0) = 0 OR sa.CategoryID = @adminIdCategoryId)",
                 new { candidateAssessmentId, adminId, adminIdCategoryId }
                 ).FirstOrDefault();
         }
diff --git a/DigitalLearningSolutions.Web/Controllers/SupervisorController/Supervisor.cs b/DigitalLearningSolutions.Web/Controllers/SupervisorController/Supervisor.cs
index dc6214fb34..5e9ab0f61b 100644
--- a/DigitalLearningSolutions.Web/Controllers/SupervisorController/Supervisor.cs
+++ b/DigitalLearningSolutions.Web/Controllers/SupervisorController/Supervisor.cs
@@ -58,7 +58,7 @@ public IActionResult MyStaffList(
             var centreId = GetCentreId();
             var supervisorEmail = GetUserEmail();
             var loggedInAdminUser = userService.GetAdminUserById(adminId);
-            var centreRegistrationPrompts = centreRegistrationPromptsService.GetCentreRegistrationPromptsByCentreId(centreId); 
+            var centreRegistrationPrompts = centreRegistrationPromptsService.GetCentreRegistrationPromptsByCentreId(centreId);
             var supervisorDelegateDetails = supervisorService.GetSupervisorDelegateDetailsForAdminId(adminId, loggedInAdminUser.CategoryId);
             if (!supervisorDelegateDetails.Any())
             {
@@ -343,7 +343,7 @@ public IActionResult AllStaffList()
             var loggedInUserId = User.GetUserId();
             var loggedInAdminUser = userService.GetAdminUserById(adminId);
             var centreCustomPrompts = centreRegistrationPromptsService.GetCentreRegistrationPromptsByCentreId(centreId);
-            var supervisorDelegateDetails = supervisorService.GetSupervisorDelegateDetailsForAdminId(adminId,loggedInAdminUser.CategoryId)
+            var supervisorDelegateDetails = supervisorService.GetSupervisorDelegateDetailsForAdminId(adminId, loggedInAdminUser.CategoryId)
                 .Select(supervisor =>
                 {
                     return supervisor;
@@ -362,6 +362,7 @@ public IActionResult ReviewDelegateSelfAssessment(int supervisorDelegateId, int
             var loggedInAdminUser = userService.GetAdminUserById(adminId);
             var superviseDelegate =
                 supervisorService.GetSupervisorDelegateDetailsById(supervisorDelegateId, GetAdminId(), 0);
+            if (superviseDelegate == null) return RedirectToAction("StatusCode", "LearningSolutions", new { code = 403 });
             var reviewedCompetencies = PopulateCompetencyLevelDescriptors(
                 selfAssessmentService.GetCandidateAssessmentResultsById(candidateAssessmentId, adminId, selfAssessmentResultId).ToList()
             );
@@ -1310,7 +1311,7 @@ public IActionResult ConfirmNominateSupervisor(SupervisorDelegateViewModel super
                     supervisorDelegateDetail.DelegateUserID,
                     (int)User.GetCentreId()
                 );
-                supervisorDelegate.SelfAssessmentCategory = supervisorDelegate.SelfAssessmentCategory == 0   ? adminUser.CategoryId.Value  : supervisorDelegate.SelfAssessmentCategory;
+                supervisorDelegate.SelfAssessmentCategory = supervisorDelegate.SelfAssessmentCategory == 0 ? adminUser.CategoryId.Value : supervisorDelegate.SelfAssessmentCategory;
                 var centreName = adminUser.CentreName;
 
                 var adminRoles = new AdminRoles(false, false, true, false, false, false, false, false);
@@ -1399,7 +1400,7 @@ public IActionResult CompetencySelfAssessmentCertificatesupervisor(int candidate
             {
                 return RedirectToAction("StatusCode", "LearningSolutions", new { code = 403 });
             }
-            var supervisorDelegateDetails = supervisorService.GetSupervisorDelegateDetailsForAdminId(adminId.Value,loggedInAdminUser.CategoryId);
+            var supervisorDelegateDetails = supervisorService.GetSupervisorDelegateDetailsForAdminId(adminId.Value, loggedInAdminUser.CategoryId);
             var checkSupervisorDelegate = supervisorDelegateDetails.Where(x => x.DelegateUserID == competencymaindata.LearnerId).FirstOrDefault();
             if ((checkSupervisorDelegate == null))
             {