Index: lams_admin/src/java/org/lamsfoundation/lams/admin/web/controller/UserController.java
===================================================================
diff -u -r0fbf2ff50fece085171175031693134a96a7750f -r346836ed4a3680af233482b184e7371ec5b620bc
--- lams_admin/src/java/org/lamsfoundation/lams/admin/web/controller/UserController.java	(.../UserController.java)	(revision 0fbf2ff50fece085171175031693134a96a7750f)
+++ lams_admin/src/java/org/lamsfoundation/lams/admin/web/controller/UserController.java	(.../UserController.java)	(revision 346836ed4a3680af233482b184e7371ec5b620bc)
@@ -120,7 +120,8 @@
 
 	// test requestor's permission
 	Organisation org = null;
-	Boolean canEdit = userManagementService.isUserGlobalGroupManager();
+	boolean isSysAdmin = userManagementService.isUserSysAdmin();
+	Boolean canEdit = userManagementService.isUserGlobalGroupManager() || isSysAdmin;
 	if (orgId != null) {
 	    org = (Organisation) userManagementService.findById(Organisation.class, orgId);
 	    if (!canEdit) {
@@ -137,7 +138,10 @@
 	    }
 	}
 
-	if (!(canEdit || request.isUserInRole(Role.SYSADMIN))) {
+	// only sysadmins can edit other sysadmins
+	canEdit &= isSysAdmin || !userManagementService.isUserSysAdmin(userId);
+
+	if (!canEdit) {
 	    request.setAttribute("errorName", "UserController");
 	    request.setAttribute("errorMessage", messageService.getMessage("error.authorisation"));
 	    return "error";
Index: lams_common/src/java/org/lamsfoundation/lams/usermanagement/service/IUserManagementService.java
===================================================================
diff -u -r2188972474f8d186d6811e3dea2e4136be669335 -r346836ed4a3680af233482b184e7371ec5b620bc
--- lams_common/src/java/org/lamsfoundation/lams/usermanagement/service/IUserManagementService.java	(.../IUserManagementService.java)	(revision 2188972474f8d186d6811e3dea2e4136be669335)
+++ lams_common/src/java/org/lamsfoundation/lams/usermanagement/service/IUserManagementService.java	(.../IUserManagementService.java)	(revision 346836ed4a3680af233482b184e7371ec5b620bc)
@@ -402,6 +402,8 @@
      */
     boolean isUserSysAdmin();
 
+    boolean isUserSysAdmin(Integer userId);
+
     /**
      * Count then umber of users with a particular role in a given org.
      *
Index: lams_common/src/java/org/lamsfoundation/lams/usermanagement/service/UserManagementService.java
===================================================================
diff -u -r8d4e389c1f1f6c95b91080d82960db4478640ced -r346836ed4a3680af233482b184e7371ec5b620bc
--- lams_common/src/java/org/lamsfoundation/lams/usermanagement/service/UserManagementService.java	(.../UserManagementService.java)	(revision 8d4e389c1f1f6c95b91080d82960db4478640ced)
+++ lams_common/src/java/org/lamsfoundation/lams/usermanagement/service/UserManagementService.java	(.../UserManagementService.java)	(revision 346836ed4a3680af233482b184e7371ec5b620bc)
@@ -948,9 +948,13 @@
 
     @Override
     public boolean isUserSysAdmin() {
+	return isUserSysAdmin(getRequestorId());
+    }
+
+    @Override
+    public boolean isUserSysAdmin(Integer userId) {
 	Integer rootOrgId = getRootOrganisation().getOrganisationId();
-	Integer requestorId = getRequestorId();
-	return requestorId != null ? isUserInRole(requestorId, rootOrgId, Role.SYSADMIN) : false;
+	return userId != null && isUserInRole(userId, rootOrgId, Role.SYSADMIN);
     }
 
     @Override