- ATLANTIC LNG
- BpTT
- BHP BILLITON
- CARIBBEAN DRYDOCK LIMTIED
- CLIFF’S & ASSOCIATES LIMITED
- CREWS INN
- DAMUS OIL
- ENVIRONMENTAL MANAGEMENT AUTHORITY (EMA)
- EXXON EXPLORATION AND PRODUCTION
- HALLIBURTON TRINIDAD LIMITED
- HYDRO AGRI TRINIDAD LIMITED (YARA)
- KERR MCGEE TT / ANADARKO OFFSHORE PETROLEUM LTD.
- LEASE OPERATORS LIMITED
- MAERSK SEALAND
- MOONSIE OIL COMPANY LIMITED
- MORA VENTURE OIL AND GAS LIMITED
- NATIONAL GAS COMPANY OF TRINIDAD AND TOBAGO LTD
- NATIONAL INFRASTRUCTURE DEVELOPMENT COMPANY OF TRINIDAD AND TOBAGO LIMITED
- NIMOS (ENVIRONMENTAL REGULATOR SURINAME)
- OPTIMAL SERVICES LTD
- P.C.S. NITROGEN
- PARADISE OIL SURINAME
- PAREX
- PRIMERA OIL AND GAS
- PORT AUTHORITY OF TRINIDAD AND TOBAGO
- POINT LISAS INDUSTRIAL PORT DEVELOPMENT CORPORATION LIMITED
- PROCESS PLANT SERVICES LIMITED
- SCHLUMBERGER TRINIDAD INC.
- SINOPEC
- STAATSOLIE SURINAME
- TRINIDAD SHELL EXPLORATION AND PRODUCTION, B.V.
- TRIMAR LIMITED
- TECHNIP OFFSHORE INC.
- TELECOMMUNICATIONS SERVICES OF TRINIDAD AND TOBAGO
- TROPICAL MARINE LIMITED
- TRINCAN OIL COMPANY LIMITED
- TRINITY OIL AND GAS
- REPSOL E & P T&T LTD
- REPSOL GUYANA
- REPSOL SURINAME EXPLORACIÓN SL
- ROCKY POINT TRINIDAD AND TOBAGO LTD
- VENTURE PRODUCTION TRINIDAD LTD
- WELL SERVICES ENERGY LIMITED