- Amphenol Interconnect India Pvt. Limited
- Areva Instrument Transformers India Limited
- Areva T & D Limited
- Asea Brown Boveri Limited (ABB)
- Baroda Bushings Insulators Limited
- Bhabha Atomic Research Centre (BARC)
- Bharat Earth Movers Limited (BEML)
- Bharat Electronics Limited (BEL)
- Bharat Heavy Electricals limited (BHEL)
- Bharat Sanchar Nigam Limited (BSNL)
- BPL Telecom Limited
- Comsat Max Limited
- Crompton Greaves Limited
- Department of Space
- Electronics & Radar Development Organization
- Electronics Corporation of India Limited (ECIL)
- ELTEL Industries
- EMCO Dynatorq Pvt. Limited,
- Epsilon Electronics Equipments & Communications Limited
- FCI OEN Connectors Limited
- Gas Turbine Research Establishment (GTRE)
- GE Fanuc Systems Pvt. Limited
- GE power Controls India Pvt. Limited
- Gujarat Narmada Valley Fertilizers Company Limited,
- Hindustan Aeronautics Limited (HAL)
- Icomm Limited
- Indian Institute of Astrophysics
- Indian institute of Science (IISC)
- Indian Telephone Industries Limited (ITI)
- ISRO Satellite Centre (ISRO)
- Measurement & Controls Limited
- MICO Limited (MICO)
- National Aerospace Laboratory (NAL)
- NIVO Controls Pvt. Limited
- Research Centre Imarat (RCI)
- Tata Teleservices Limited (TTSL)
- Teknic Electromeconics Pvt. Limited
- Teknic Euchner Electronics Pvt. Limited
- Tyco Electronics Corp. India Pvt. Limited
- Vishakapatnam Steel Plant (VSP)
- Visvesvaraya Iron & Steel Limited (VISL)
- Vodaphone Essar South Limited
- Yokogawa India Limited,