The Director General of Audit, Southern Railway is responsible for the audit of all transactions relating to:-
- Southern Railway
- Integral Coach Factory
- Railway Recuitment Boards at Chennai and Trivandrum
- Railway Rates Tribunal, Chennai
- Railway Claims Tribunal, Chennai
- Metropolitan Transport Project (Railways), Chennai.
The organisation of the Headquarters office and the subordinate offices of the Director General of Audit follows the administrative pattern adopted by these organisations.