| Name | Web Site | GPA Member | GPSA Member |
|---|---|---|---|
| A+ Corporation | Visit | N | Y |
| Absolute Noise Control/EZ Pipe Wraps | Visit | N | Y |
| Accurate Gas Products, LLC | Visit | N | Y |
| Accurate Lab Audits, LLC | Visit | N | Y |
| ADI Analytics | Visit | N | Y |
| Aeon PEC | Visit | N | Y |
| Afton Pumps, Inc. | Visit | N | Y |
| Airgas | Visit | N | Y |
| Aka Energy Group, LLC | Visit | Y | N |
| Alfa Laval Niagara | Visit | N | Y |
| Allan Edwards, Inc. | Visit | N | Y |
| Allegiance Electric LLC | Visit | N | Y |
| Alliance Emissions Monitoring, LLC | Visit | N | Y |
| Alliance Source Testing | Visit | N | Y |
| Alpha Engineering International | Visit | N | Y |
| Name | Web Site | GPA Member | GPSA Member |
| Alpine Site Services | Visit | N | Y |
| Altus Midstream | Visit | Y | N |
| AMACS Process Tower Internals | Visit | N | Y |
| Analytical Systems Keco | Visit | N | Y |
| Antero Resources Corp. | Visit | Y | N |
| Applied Control | Visit | N | Y |
| ARC Energy | Visit | N | Y |
| Archrock, Inc. | Visit | N | Y |
| Ariel Corporation | Visit | N | Y |
| Arkema, Inc. | Visit | N | Y |
| Astec Industries (Heatec, Inc.) | Visit | N | Y |
| Atlas Copco Gas and Process | Visit | N | Y |
| Atwell, LLC | Visit | N | Y |
| Audubon | Visit | N | Y |
| AUX Sable Liquid Products Inc. | Visit | Y | N |
| Name | Web Site | GPA Member | GPSA Member |
| AVEVA | Visit | N | Y |
| AXH Air-Coolers | Visit | N | Y |
| Azota Gas Processing, Ltd. | Visit | N | Y |
| Azure Midstream Energy LLC | Visit | Y | N |
| Baker & O'Brien, Inc. | Visit | N | Y |
| Baltimore Aircoil Co. | Visit | N | Y |
| Barry D. Payne & Associates – Mangan Inc. | Visit | N | Y |
| Bartlett & West | Visit | N | Y |
| Bartlett Equipment Co. | Visit | N | Y |
| BASF Corp. | Visit | N | Y |
| BCCK Holding | Visit | N | Y |
| Bexar Energy Holdings, Inc. | Visit | N | Y |
| BGE, Inc. | Visit | N | Y |
| Bi-Con Engineering LLC | Visit | N | Y |
| Bilfinger Inc. | Visit | N | Y |
| Name | Web Site | GPA Member | GPSA Member |
| Black & Veatch Corp. | Visit | N | Y |
| Black Diamond Gathering | Visit | Y | N |
| Blair Engineering | Visit | N | Y |
| Blue Racer Midstream | Visit | Y | N |
| Boardman, LLC | Visit | N | Y |
| Boardwalk Louisiana Midstream, LLC | Visit | Y | N |
| Bold Production Services, LLC | Visit | N | Y |
| Borets | Visit | N | Y |
| Bowden Construction Co. Ltd. | Visit | N | Y |
| Brown & Root Industrial Services | Visit | N | Y |
| Bryan Research & Engineering, LLC | Visit | Y | Y |
| Buffalo Gap Instrumentation & Electrical | Visit | N | Y |
| Burns & McDonnell | Visit | N | Y |
| BWFS Industries, LLC | Visit | N | Y |
| C3 Resources, LLC | Visit | N | Y |
| Name | Web Site | GPA Member | GPSA Member |
| Calpine Energy Solutions | Visit | N | Y |
| Cameron LNG | Visit | Y | N |
| Cameron, A Schlumberger Company | Visit | N | Y |
| Cardinal Midstream, LLC | Visit | Y | N |
| Carrera Gas Company, L.L.C. | Visit | Y | N |
| Catalytic Combustion Corporation | Visit | N | Y |
| Catalytic Products International, Inc. | Visit | N | Y |
| Catco USA | Visit | N | Y |
| Caterpillar, Inc. | Visit | N | Y |
| CECO-Compressor Engineering Corp. | Visit | N | Y |
| ChampionX | Visit | N | Y |
| Charbonneau Industries, Inc. | Visit | N | Y |
| Charger Energy Services LLC | Visit | N | Y |
| Charis Engineering, LLC | Visit | N | Y |
| Chart Industries | Visit | N | Y |
| Name | Web Site | GPA Member | GPSA Member |
| ChemTreat, Inc. | Visit | N | Y |
| Cheniere Energy | Visit | N | Y |
| Chevron North American Production | Visit | Y | N |
| Chiyoda Corp. | Visit | N | Y |
| Cimarex Energy Co. | Visit | Y | N |
| Civil and Environmental Consultants | - | N | Y |
| Coastal Chemical Co., LLC | Visit | N | Y |
| Cogent Midstream, LLC | Visit | Y | N |
| ColdStream Energy, LLC | Visit | N | Y |
| Compass Compression Solutions, Inc | Visit | N | Y |
| COMPRESSORtech2 | Visit | N | Y |
| ConocoPhillips | Visit | Y | N |
| Cooper Machinery Services | Visit | N | Y |
| CoreWorks, LLC | Visit | N | Y |
| Crestwood Midstream Partners LP | Visit | Y | N |
| Name | Web Site | GPA Member | GPSA Member |
| Critical Control Energy Services | Visit | N | Y |
| CSD Engineers, LLC | Visit | N | Y |
| CSI Compressco LP | Visit | N | Y |
| Dahlia | Visit | N | Y |
| DCG Partnership 1, Ltd. | - | N | Y |
| DCP Midstream, LP | Visit | Y | N |
| Dearing Compressor & Pump Co. | Visit | N | Y |
| Derrick Oneal Company LLC | Visit | N | Y |
| Devco Process Heaters | Visit | N | Y |
| Dew Point Control, LLC | Visit | N | Y |
| Diablo Analytical, Inc. | Visit | N | Y |
| Dickson Process Systems, Ltd. | Visit | N | Y |
| DistributionNow | Visit | N | Y |
| Dollahon PR | Visit | N | Y |
| Dow Hydrocarbons and Resources LLC | Visit | Y | N |
| Name | Web Site | GPA Member | GPSA Member |
| Dual Drive Technologies | Visit | N | Y |
| Durango Midstream LLC | Visit | Y | N |
| DXP Enterprises Inc. | Visit | N | Y |
| EagleClaw Midstream | Visit | Y | N |
| Eastman | Visit | N | Y |
| Eaton Metal Products | Visit | N | Y |
| EcoVapor Recovery Systems | Visit | N | Y |
| EDG, Inc. | Visit | N | Y |
| Element Integrity Group | Visit | N | Y |
| Emerson | Visit | N | Y |
| Empact Analytical Systems, Inc. | Visit | N | Y |
| ENABLE Midstream Partners | Visit | Y | N |
| EnCap Flatrock Midstream | Visit | Y | N |
| Encore Oilfield Services, LLC | Visit | N | Y |
| Endress+Hauser USA | Visit | N | Y |
| Name | Web Site | GPA Member | GPSA Member |
| Enerfin Resources Company | Visit | Y | N |
| Enerflex | Visit | N | Y |
| Energy Transfer Co. | Visit | Y | N |
| EnerSys Corporation | Visit | N | Y |
| EnFlex Group | Visit | N | Y |
| Engineered Thermal Solutions | Visit | N | Y |
| ENGlobal U.S. Inc. | Visit | N | Y |
| EnLink Midstream | Visit | Y | N |
| Enterprise Products Operating LP | Visit | Y | N |
| EPCON International | Visit | N | Y |
| EPIC | Visit | N | Y |
| EPIC Midstream | Visit | Y | N |
| Equinor ASA | Visit | Y | N |
| Equity Engineering Group, Inc. | Visit | N | Y |
| ERM - Dallas Office | Visit | N | Y |
| Name | Web Site | GPA Member | GPSA Member |
| eSimulation, Inc. | Visit | N | Y |
| EXTERRAN | Visit | N | Y |
| ExxonMobil/XTO | Visit | Y | N |
| F&C Engineers | Visit | N | Y |
| Fabsco Shell & Tube, LLC | Visit | N | Y |
| Federal Services, LLC | Visit | N | Y |
| FES-Southwest, Inc. | Visit | N | Y |
| FESCO, Ltd. | Visit | N | Y |
| Files and Associates | Visit | N | Y |
| Filtration Technology Corp. | Visit | N | Y |
| Fives Cryo, Inc. | Visit | N | Y |
| Flatrock Engineering and Environmental | Visit | N | Y |
| FlexSteel Pipeline Technologies | Visit | N | Y |
| Flow Control Services | Visit | N | Y |
| Fluid Flow Products, Inc. | Visit | N | Y |
| Name | Web Site | GPA Member | GPSA Member |
| Fluor Enterprises, Inc. | Visit | N | Y |
| Freese and Nichols, Inc. | Visit | N | Y |
| Fulton Thermal Corp. | Visit | N | Y |
| FW Murphy Production Controls | Visit | N | Y |
| G2 Integrated Solutions | Visit | N | Y |
| Galileo Technologies | Visit | N | Y |
| Gas Equipment Co., Inc. | Visit | N | Y |
| Gas Processing & LNG | Visit | N | Y |
| Gas Processors Suppliers Association | Visit | N | Y |
| Gas Technology Corp. | Visit | N | Y |
| Gas Treatment Services B.V. | Visit | N | Y |
| GasTech Engineering, LLC | Visit | N | Y |
| GEA Systems North America LLC | Visit | N | Y |
| Gemstar, Inc. | Visit | N | Y |
| GPA Midstream Association | Visit | Y | N |
| Name | Web Site | GPA Member | GPSA Member |
| GTC Vorro | Visit | N | Y |
| GTUIT | Visit | N | Y |
| Gulf Coast Chemical, LLC | Visit | N | Y |
| Gulf Coast Engineered Solutions, Inc. | Visit | N | Y |
| Gulf Interstate Engineering | Visit | N | Y |
| H2W United, LLC | Visit | N | Y |
| Halff Associates, Inc. | Visit | N | Y |
| Heat Transfer Specialists, Inc. | Visit | N | Y |
| Heath Consultants Incorporated | Visit | N | Y |
| Hobre USA | Visit | N | Y |
| Holloway Technical Services | Visit | N | Y |
| Honeywell UOP | Visit | N | Y |
| Hotstart Sales LLC | Visit | N | Y |
| Houston Integrity Consultants | Visit | N | Y |
| Howard Energy Midstream Partners | Visit | Y | N |
| Name | Web Site | GPA Member | GPSA Member |
| Howard Field Services, LLC | Visit | N | Y |
| HPI Energy Services LLC | Visit | N | Y |
| Hunt, Guillot & Associates | Visit | N | Y |
| Huntsman Corp. | Visit | N | Y |
| Hydrocarbon Measurement Consultants, Inc. | - | N | Y |
| ICA Fluor | Visit | N | Y |
| INEOS GAS/SPEC Technology Group | Visit | N | Y |
| Infinity Project Management, Inc. (IPM) | Visit | N | Y |
| INNIO Waukesha Gas Engines Inc. | Visit | N | Y |
| Intensity Midstream LLC | Visit | Y | N |
| International Energy Services | Visit | N | Y |
| Interra Global Corp. | Visit | N | Y |
| Interstate Treating, Inc. | Visit | N | Y |
| Intertek Caleb Brett | Visit | N | Y |
| ION PRO Services, LLC | Visit | N | Y |
| Name | Web Site | GPA Member | GPSA Member |
| ISTI Plant Services | Visit | N | Y |
| J-W Power Company | Visit | N | Y |
| J. H. Foglietta Consulting, LLC | Visit | N | Y |
| J.S. James Co. | Visit | N | Y |
| Jasper Ventures, Inc. | Visit | N | Y |
| JFE Engineering Corporation | Visit | N | Y |
| JGC Corporation | Visit | N | Y |
| John Zink Company, LLC | Visit | N | Y |
| Johnson Matthey | Visit | N | Y |
| Johnson Petrotech Services, Inc. | - | N | Y |
| Johnson Screens | Visit | N | Y |
| Jonell, Inc. | Visit | N | Y |
| Joule Processing, LLC | Visit | N | Y |
| JP3 Measurement | Visit | N | Y |
| Kahuna Ventures | Visit | N | Y |
| Name | Web Site | GPA Member | GPSA Member |
| Kams, Inc. | Visit | N | Y |
| Kane Environmental Engineering | - | N | Y |
| Kiewit Energy Group | Visit | N | Y |
| Kinder Morgan | Visit | Y | N |
| Koch-Glitsch LP | Visit | N | Y |
| Kodiak Gas Services | Visit | N | Y |
| Kuwait Petroleum Corporation | Visit | Y | N |
| L.A. Turbine | Visit | N | Y |
| Laboratory Services | - | N | Y |
| Lamar University | Visit | Y | N |
| LCM Industries, Inc. | Visit | N | Y |
| Lexicon, Inc. | Visit | N | Y |
| Liberty Midstream Solutions | Visit | Y | N |
| Lilly Consulting | Visit | N | Y |
| Linde Engineering Americas | Visit | N | Y |
| Name | Web Site | GPA Member | GPSA Member |
| Lindsayca Solutions | Visit | N | Y |
| Logic Masterminds, LLC | Visit | Y | Y |
| Lucid Energy Group II | Visit | Y | N |
| Lummus Technology | Visit | N | Y |
| M Chemical Company | Visit | N | Y |
| M J & H Fabrication | Visit | N | Y |
| M4 Equipment | Visit | N | Y |
| Mangan, Inc. | Visit | N | Y |
| Marathon Petroleum Corp. | Visit | Y | N |
| Martin Midstream Partners, LP | Visit | Y | N |
| Master Corporation | Visit | N | Y |
| Matrix PDM Engineering | Visit | N | Y |
| Mayekawa USA, Inc. | Visit | N | Y |
| McCartney Gas Advisors, LLC | - | N | Y |
| McClung Energy Services, LLC | Visit | N | Y |
| Name | Web Site | GPA Member | GPSA Member |
| Melland Engineering & Consulting | Visit | N | Y |
| Merichem | Visit | N | Y |
| Meritage Midstream Services II, LLC | Visit | Y | N |
| Midcoast Energy | Visit | Y | N |
| Midstream Energy Group, Inc. | Visit | N | Y |
| Mitsubishi Heavy Industries Compressor International | Visit | N | Y |
| Mobile Analytical Laboratories, Inc. | Visit | N | Y |
| Momentum Midstream | Visit | Y | N |
| Monico Monitoring, Inc. | Visit | N | Y |
| Moore Control Systems, Inc. | Visit | N | Y |
| Morrow Energy | Visit | N | Y |
| Movilab, S.A. de C.V. | Visit | N | Y |
| MPLX LP | Visit | Y | N |
| MRC Global Inc. | Visit | N | Y |
| Munters | Visit | N | Y |
| Name | Web Site | GPA Member | GPSA Member |
| Muse, Stancil & Co. | Visit | Y | N |
| Mustang Cat | Visit | N | Y |
| Mustang Gas Products, LLC | Visit | Y | N |
| Mustang Sampling | Visit | N | Y |
| Nalco Water | Visit | N | Y |
| Navitas Midstream Partners | Visit | Y | N |
| Neuman & Esser USA, Inc. | Visit | N | Y |
| New Industries, LLC | Visit | N | Y |
| New Tech Global Ventures | Visit | N | Y |
| Nexo Solutions | Visit | N | Y |
| Nikkiso CE&IG | Visit | N | Y |
| NorthStar Energy Services, Inc. | Visit | N | Y |
| Norwood S&S, LLC | Visit | N | Y |
| NTACT Operations, LLC | Visit | N | Y |
| Nuevo Midstream Dos, LLC | Visit | Y | N |
| Name | Web Site | GPA Member | GPSA Member |
| OGT | Visit | N | Y |
| Oliver Equipment Co. | Visit | N | Y |
| Olympus Scientific Solutions | Visit | N | Y |
| Omni Air & Nitrogen | Visit | N | Y |
| ONEOK Inc. | Visit | Y | N |
| Operational Sustainability, LLC | Visit | N | Y |
| optek-Danulat, Inc. | Visit | N | Y |
| Optimized Gas Treating, Inc. | Visit | N | Y |
| Optimized Process Designs | Visit | N | Y |
| Optimized Process Furnaces | Visit | N | Y |
| Ovintiv USA Inc. | Visit | Y | N |
| Pall Corporation | Visit | N | Y |
| Pantechs Laboratories, Inc. | Visit | N | Y |
| Paratherm - Heat Transfer Fluids | Visit | N | Y |
| Parker IPF (PECO) Parker Hannifin Corp. | Visit | N | Y |
| Name | Web Site | GPA Member | GPSA Member |
| Pasadyn, Inc. | Visit | N | Y |
| Patriot Process Equipment | Visit | N | Y |
| Payne-Huber Engineering, Inc. | Visit | N | Y |
| PCES, LLC | Visit | N | Y |
| Peak AI Solutions | Visit | N | Y |
| Pearson Adair & Co. | Visit | Y | N |
| Pegasus EHS | Visit | N | Y |
| Pentair Filtration Solutions, Inc. | Visit | N | Y |
| PERC Engineering, LLC | Visit | N | Y |
| Peso Energy USA | Visit | N | Y |
| Petron Asia Energy PTE Ltd. | Visit | N | Y |
| PetroSkills/John M. Campbell | Visit | N | Y |
| Phillips 66 | - | Y | N |
| Phoenix Park Gas Processors Ltd. | Visit | Y | N |
| Pinnacle Midstream II LLC | Visit | Y | N |
| Name | Web Site | GPA Member | GPSA Member |
| Plains All American | Visit | Y | N |
| PLC Construction Inc. | Visit | N | Y |
| Powertherm Maxim | Visit | N | Y |
| Precision Catalyst | Visit | N | Y |
| Prime Controls, LP | Visit | N | Y |
| Prism Midstream LLC | - | Y | N |
| Profab Construction & Supply | Visit | N | Y |
| ProSep Inc. | Visit | N | Y |
| Proteum Energy, LLC | Visit | N | Y |
| PSI (Process Solutions Integration) | Visit | N | Y |
| Puffer Sweiven | Visit | N | Y |
| Q.B. Johnson Manufacturing, Inc. | Visit | N | Y |
| Quadra Chemicals, Inc. | Visit | N | Y |
| QuantityWare GmbH | Visit | N | Y |
| Quest Consultants Inc. | Visit | N | Y |
| Name | Web Site | GPA Member | GPSA Member |
| Quorum Business Solutions | Visit | N | Y |
| R & R Engineering Co., Inc. | Visit | N | Y |
| R&H Technical Sales, Inc. | Visit | N | Y |
| Raffinate Technologies | Visit | N | Y |
| Ramboll | Visit | N | Y |
| Ranger Plant Constructional Co. Inc. | Visit | N | Y |
| Red Ball Technical Gas Services | Visit | N | Y |
| Red Cedar Gathering Co. | Visit | Y | N |
| Redd Ridge Consulting, LLC | Visit | N | Y |
| Reese Midstream Report | Visit | N | Y |
| Ref-Chem LP | Visit | N | Y |
| Regard Resources Co., Inc. | Visit | N | Y |
| Reset Energy | Visit | N | Y |
| Reverse Technology Resources LLC | - | N | Y |
| Rhine Ruhr Pty, Ltd. | Visit | N | Y |
| Name | Web Site | GPA Member | GPSA Member |
| River City Engineering | Visit | N | Y |
| Ro-Flo Compressors, LLC | Visit | N | Y |
| Ross Group | Visit | N | Y |
| Roto-flow, An Air Products Business | Visit | N | Y |
| Rotor-Tech, Inc. | Visit | N | Y |
| Royal Filter Mfg. Co., Inc. | Visit | N | Y |
| S & B Engineers and Constructors, Ltd. | - | N | Y |
| S&B Helical | Visit | N | Y |
| S2W Contracting LLC | - | N | Y |
| Salt Creek Midstream | Visit | Y | N |
| Samuel Engineering, Inc. | Visit | N | Y |
| San Mateo Midstream | Visit | Y | N |
| Sapphire Technologies, LLC | Visit | N | Y |
| Sargent & Lundy | Visit | N | Y |
| Saulsbury Industries, Inc. | Visit | N | Y |
| Name | Web Site | GPA Member | GPSA Member |
| Scelerin Heaters, LLC | Visit | N | Y |
| Schultz Process Services, Inc. | Visit | N | Y |
| Scion Instruments | Visit | N | Y |
| SEC Energy Products & Services, LP | Visit | N | Y |
| Select Engineering, Inc. | Visit | N | Y |
| Selective Adsorption Associates, Inc. | Visit | N | Y |
| Sendero Midstream Partners, LLC | Visit | Y | N |
| Sensia Global | Visit | N | Y |
| Sepra-Chem Corp. | Visit | N | Y |
| SERO PumpSystems, Inc. | Visit | N | Y |
| SGS North America Inc. | Visit | N | Y |
| Shamrock Gas Analysis | Visit | N | Y |
| Shrieve Chemical Products, Inc. | Visit | N | Y |
| Siemens | Visit | N | Y |
| SIGIT Operating Co. | Visit | N | Y |
| Name | Web Site | GPA Member | GPSA Member |
| SkySkopes | Visit | N | Y |
| SME Process Solution | Visit | N | Y |
| Solar Turbines, Inc. | Visit | N | Y |
| Southcross Energy | Visit | Y | N |
| Southern Heat Exchanger | Visit | N | Y |
| Spartan Energy Partners | Visit | N | Y |
| Spitzer Industries | Visit | N | Y |
| SPL, Inc. | Visit | N | Y |
| Stakeholder Midstream | Visit | Y | N |
| Startec Compression and Process | Visit | N | Y |
| Stellar Plant Services | Visit | N | Y |
| Strategic Automation Services, LLC | Visit | N | Y |
| Stress Engineering Services | Visit | N | Y |
| SULPETRO, Inc. | Visit | N | Y |
| Sulzer Chemtech | Visit | N | Y |
| Name | Web Site | GPA Member | GPSA Member |
| Sundyne Corporation | Visit | N | Y |
| Sunland Construction, Inc. | Visit | N | Y |
| Superior Energy Systems, Ltd. | Visit | N | Y |
| Superior Pipeline Co. | Visit | Y | N |
| Tailwater Technical Consulting | Visit | N | Y |
| Targa Resources, Inc. | Visit | Y | N |
| Taylor Forge Engineered Systems | Visit | N | Y |
| TECO-Westinghouse | Visit | N | Y |
| Tek-Fins Inc. | Visit | N | Y |
| Texas Pipe & Supply Co., LTD | Visit | N | Y |
| Texas Turbine, Inc. | Visit | N | Y |
| TM-EMS, LLC | Visit | N | Y |
| TMCO Operating, LLC | Visit | N | Y |
| Tomcej Engineering Inc. | Visit | N | Y |
| TorcSill Foundations | Visit | N | Y |
| Name | Web Site | GPA Member | GPSA Member |
| Torrent Energy Services | Visit | N | Y |
| Total Energy Corp. | Visit | N | Y |
| Tower Force | Visit | N | Y |
| TransTech Energy | Visit | N | Y |
| TransTex Treating | Visit | N | Y |
| Trimeric Corp. | Visit | N | Y |
| Triumph Gas Technology Consulting | Visit | N | Y |
| Tryer Process Equipment | Visit | N | Y |
| Tulco Oils | Visit | N | Y |
| Tulsa Heaters Midstream | Visit | N | Y |
| UE Compression | Visit | N | Y |
| Union Tech | Visit | N | Y |
| Unison Industrial Solutions | Visit | N | Y |
| United Gas Derivatives Co. | Visit | Y | N |
| United Steel Structures, Inc. | Visit | N | Y |
| Name | Web Site | GPA Member | GPSA Member |
| Univar Solutions | Visit | N | Y |
| Upstream Development and Engineering, Inc. | Visit | N | Y |
| Vapor Point | Visit | N | Y |
| VGas, LLC | Visit | N | Y |
| Vinson Process Controls | Visit | N | Y |
| VME | Visit | N | Y |
| VMG, A Schlumberger Technology | Visit | N | Y |
| W Energy Software | Visit | N | Y |
| W-Industries | - | N | Y |
| Wagner Power Systems | Visit | N | Y |
| Wanzek Construction, Inc. | Visit | N | Y |
| Wasson-ECE Instrumentation | Visit | N | Y |
| Watson Millican & Co. | Visit | Y | N |
| Waukesha Pearce Industries | Visit | N | Y |
| WeldFit Corporation | Visit | N | Y |
| Name | Web Site | GPA Member | GPSA Member |
| Western Filter Co., Inc. | Visit | N | Y |
| Western Midstream Partners, LP | Visit | Y | N |
| White Lion | - | N | Y |
| Williams | Visit | Y | N |
| WinSim Inc. | Visit | N | Y |
| Wolverine Flow Control, LP | - | N | Y |
| Wood | Visit | N | Y |
| Woodland Midstream LLC | Visit | Y | N |
| Worldwide Air Coolers | Visit | N | Y |
| Worley Group Inc. | Visit | N | Y |
| WR Grace | Visit | N | Y |
| WSP | Visit | N | Y |
| XCEL Group | - | N | Y |
| York Process Systems | Visit | N | Y |
| ZAP Engineering & Construction Services, Inc. | Visit | N | Y |
| Name | Web Site | GPA Member | GPSA Member |
| Zeochem | Visit | N | Y |
