National Highways Authority of India Ministry of Road Transport & Highways
Road Construction Department, Government of Bihar Water Resource Department, Government of Bihar
Flood Control Department, Government of Bihar
IRCON International Limited Indian Oil Corporation Limited HHindustan Urvarak Rasayan Limited
Technip FMC Technip Energies MCDERMOTT Prodair Air Product Punjlloyd Linde ivrcl
Lanco Infratech Limited C&C Constructions Ltd.