The Civil Services of India are organised into two sections.

• All India Services and
• Central Services.

All India Services include:

• Indian Administrative Service (IAS)
• Indian Police Service (IPS)
• Indian Forest Service (IFtS)

Central Services include
Group A:

• Indian Foreign Service (IFS)
• Indian Railway Service
• Indian Postal Service
• Accounts and Auditing Services (including The Indian Audit and Accounts Service, The Indian Civil Accounts Service, The Indian Defence Accounts Service, The Indian Revenue Service.)
• Indian Customs and Central Excise
• Indian Ordinance Factories Service
• Indian Defence Estates Service
• Indian Revenue Service
• Indian Information Service
• Central Trade Services
• Central Industrial Security Force

Group B:

• Central Secretariat Services (Section Officer Grade)
• Railway Board Secretariat Services (Section Officer Grade)
• Armed Forces Headquarters Civil Services (Assistant Civilian Staff Officer Grade)
• Customs Appraisers' Services
• The Delhi, Andaman and Nicobar Islands, Lakshadweep, Daman & Diu and Dadra & Nagar Haveli Civil Services
• The Delhi, Andaman and Nicobar Islands, Lakshadweep, Daman & Diu and Dadra & Nagar Haveli Police Services
• Pondicherry Civil Services
• State Civil Services

The service categories to which candidates are selected through the SCS examination are:

• State Civil Services, Class-I (SCS)
• State Police Service, Class-I (SPS).
• Block Development Officer.
• Tehsildar/Talukadar/Asstt. Collector.
• Excise and Taxation Officer.
• Distt. Employment Officer.
• Distt. Treasury Officer.
• Distt Welfare Officer.
• Asstt Registrar Cooperative Societies.
• Distt. Food and Supplies Controller/Officer.