For Risk team, we use field "SUB-CHANNEL-CODE" to identify the latest customer status whether they are our Employees, X-Sell, deviate cases, secured card, etc. Only identifying our Employee, we have to check from both "SUB-CHANNEL-CODE" and "IS-GE-STAFF" field in DWH. DWH team used to recommend us to use field "IS-GE-STAFF" (Value - Y or N) that is more up-to-date because they update value of this field by using list from HR every month .