DMRC (Delhi Metro Rail Corporation Limited)
(A Joint Venture of Government of India and Govt.of Delhi)
Mineral Exploration Corporation Limited
(A Government of India Enterprise)
DTTDC (Delhi Tourism & Transportation Development Corporation Limited.
(Government Undertaking)
Department of Industry, Mines and Geology, Directorate of Geology
(Government of Jharkhand)
NBCC
(National Buildings construction corporation limited)
L&T
(Larsen & Toubro Limited)
SS Infrastructure Development Consultants Pvt. Ltd.
Gammon India Limited.
DSC (D.S. Construction Limited)
NEC (Navayuga Engineering Company Limited)
ITD – ITD Cem JV
Bala Jee Infratech & Constructions Pvt.Ltd
J.Kumar Infraprojects Limited
PLRC (PL Raju Construction Ltd)
CCCL (Consolidated Construction Consortium Ltd)
Beaver Infra Consultants Pvt. Ltd.
Afcons Infrastructure Limited.
ERA Infra.
Jindal Buildsys.
Indian Geotechnical Services.
SM Consultants.
