In HM Revenue and Customs there are nine main grades of officer:
1. Administration assistant
2. Assistant officer
3. Officer
4. Higher officer
5. Senior officer
6. Fast stream/trainee
7 Grade 7
8. Grade 6
9. Senior civil servant (SCS).
The SCS grade can be broken down further:
(a) SCS 1
(b) SCS 1A
(c) SCS 2
(d) SCS 3.