List of Group I Services:
CCS – I Examination (Group I Services)
- Deputy Collector – Tamil Nadu civil service
- Deputy Superintendent of Police (DSP) – Tamil Nadu Police Service.
- Assistant Director – Rural Development
- Assistant Commissioner – Tamil Nadu Commercial Taxes Service
- District Registrar – Tamil Nadu Registration Service
- Deputy Registrar, Cooperative Department
- District Employment Officer – Tamil Nadu General Service
- District Officer (Fire and Rescue Service) – Tamil Nadu Fire and Rescue Service