Corporate Members
| Air Liquide Global E&C Solutions Germany GmbH | Amines & Plasticizers Ltd |
| ANDRITZ AG | Arkema France |
| Atlas Copco Energas GmbH | Axens |
| BASF SE | Bechtel Ltd. |
| BP Exploration Operating Co. Ltd. | ConocoPhillips LNG Technology & Licensing |
| Costain | DNV GL |
| Dow Chemical Co. | ENGIE - CRIGEN |
| ENI Spa | Equinor |
| Fives Cryo | Fjords Processing France SAS |
| Fluor Ltd. | Gassco AS |
| Huntsman Belgium BVBA | Johnson Matthey |
| Kellogg Brown & Root | Linde AG |
| McDermott | Pall Europe |
| Parker Hannifin - PECO | Petrofac Engineering Ltd |
| Pietro Fiorentini | Saipem SpA |
| Sazeh Consultants | SLB |
| Shell Global Solutions International BV | Spirax Sarco |
| TechnipEnergies | Tecnimont S.p.A |
| TotalEnergies | Uniper Technologies GmbH |
| William Blythe Limited | Wintershall Dea GmbH |
| Wood Group UK Limited | Worley (Comprimo) |
| Aragon AS | Axiom Angewandte Prozesstechnik GmbH |
| BASF Catalysts Germany GmbH | Bryan Research And Engineering |
| Chart Energy and Chemicals Inc | Hatch |
| Heatric | Iv-Oil and Gas |
| KBC Process Technology Ltd | Kelvion Ltd. |
| Kent Energies UK Ltd | Liquid Gas Equipment Ltd |
| MySep Pte Ltd | Oil & Gas Systems Limited |
| Orbital Gas Systems Ltd | Paqell B.V. |
| PetroSkills|John M Campbell | PGNiG SA Oddzial w Odolanowie |
| Process Vision Ltd | SBM Schiedam |
| Siemens Process Systems Engineering Limited | Sulzer Chemtech Ltd |
| Syzygy Plasmonics | Technip Energies UK |
| Teesside Gas & Liquids | TGE Gas Engineering GmbH UK Branch |
| Tranter | UOP BVBA. |
| Vahterus Oy | VTU Engineering GmbH |
| WinSim Inc | Zeochem AG |
| Abbey Industrial Sales Co Ltd | Bohr Limited |
| Bring Solutions BV | Gasconsult Ltd |
| ISG | Kirk Process Solutions |
| MPR Services | Optimized Gas Treating |
| Petrogenium | Phillip Townsend Associates Ltd |
| SDS Separation Technology B.V. | Sulphur Experts |
| Thermasep |
| Hydrocarbon Processing |