Shell Petroleum Development Company (SPDC)
Mobil Producing Nigeria Unlimited (MPN)
Chevron Nigeria Limited.
Delta Afrik Nigeria Limited
Nigerian National Petroleum Corporation (NNPC)
Power Holdings Company of Nigeria (PHCN)
Eleme Petrochemicals Port Harcourt
Briton Services Warri
Ozono Nig Ltd
Petroleum Training Institute Effurun, Delta State
Ashialin Nig Ltd
Amsek Nig Ltd
Sapper Nigerian Army(NNPC Project)
Gramen Petroserve Nig, Ltd |