KUWAIT OIL COMPANY (K.O.C.)
LARSEN & TOUBRO – L&T
LINDE
MAERSK OIL
MARATHON PETROLEUM COMPANY LP
MCDERMOTT INTERNATIONAL, INC.
NATIONAL PETROLEUM CONSTRUCTION COMPANY (NPCC) OFFSHORE ENGINEERING SERVICES (ONGC)
OXY OCCIDENTAL
PDVSA
PETROFAC
PETROLEUM DEVELOPMENT OMAN L.L.C. (PDO)
QATAR PETROLEUM
REKAYASA INDUSTRI
RELIANCE INDUSTRIES LIMITED
REPSOL
ROSETTI MARINO SPA
SABIC
SAIPEM – ENI
SAMSUNG
SAUDI ARAMCO
SHELL
TECHNIPFMC
TECNIMONT
TOTAL
TOYO ENGINEERING
WORLEY PARSONS