Government Departments
- NEYVELI LIGNITE CORPORATION (NLC)
- TAMILNADU CEMENT CORPORATION LIMITED (TANCEM)
- TAMILNADU MAGNESITE LIMITED (TANMAG)
- TAMILNADU INDUSTRIAL EXPLOSIVES LIMITED (TEL)
- TAMILNADU MINERALS LIMITED (TAMIN)
- TAMILNADU SMALL INDUSTRIES CORPORATION LIMITED (TANSI)
- TAMILNADU POLLUTION CONTROL BOARD(TNPCB)
- MINING & ALLIED MACHINERY CORPORATION LIMITED (R&S)