-› Engineers India Ltd.
-› Kvaerner Power Gas Ltd.
-› Bechtel Ltd., France
-› Gherzi Eastern
-› MECON
-› RITES
-› Toyo Engineering
-› IRCON International
-› Consulting Engineering Services

-› Le-ND Consultants

-› Humphry & Glasgow

-› Tata Consultants

-› SMPS Consultants