There are 12 Departments/Groups available for CSS Posts.
(1) Commerce & Trade Group
(2) Foreign Service of Pakistan
(3) Information Group
(4) Inland Revenue Service
(5) Military Lands & Cantonments Group
(6) Office Management Group
(7) Pakistan Administrative Service
(8) Pakistan Audit and Accounts Service
(9) Pakistan Customs Service
(10) Police Service of Pakistan
(11) Postal Group
(12) Railways (Commercial & Transportation) Group