The Secretariat of GASAB is headed by ADAI/GASAB. It is constituted by officers of premier accounts and finance streams belonging to the Civil Services .They are from: 1. Indian Audit and Accounts Service(IA&AS) 2. Indian Civil Accounts Service(ICAS) 3. Indian Defence Accounts Service(IDAS) 4. Indian Post and Telecom Accounts Service(IP&TAFS) 5. Indian Railway Accounts Service(IRAS)