- 3DS
- Access Sciences Corporation
- Acecad Software Ltd
- Adaptive Corporation
- Advanced 3D Technologies
- Advertas, LLC
- Advertas, LLC
- Air Liquide
- AkzoNobel
- Alstom
- Alstom Power, Inc.
- AMEC Paragon Engineering Svcs. Inc.
- Amerapex Corporation
- American Electric Power
- Apache Corporation
- API
- Aramco Services
- ARC Advisory Group
- ARIOSHE
- Artesys International
- ArTrA
- ASCI Asset Management Services
- ASD Inc.
- Aspen Technology, Inc.
- AspenTech
- Atomic Energy Of Canada Ltd
- Audubon Engineering
- Autodesk, Inc.
- AVEVA
- AVEVA East Asia Ltd.
- Avineon Inc.
- B & W Y12
- Basell USA
- BASF Corporation
- Bayer Business and Technology Services LLC
- Bayer Corporate Business Services
- Bayer Technology Services LLC
- Bechtel
- Bechtel Corporation
- Bentley Systems, Inc.
- BlueCielo ECM Solutions
- BP America
- Brass LNG Limited
- Burns & McDonnell
- Burns and Roe
- Burns and Roe Enterprises,Inc.
- CAD Schroer
- Cadmatic oy
- CAXperts GmbH
- CBI
- CEA Systems Inc.
- CH2M Hill
- Chemical Engineering
- Chemtech - A Siemens Company
- Chevron Corporation
- Chevron Global Manufacturing
- ChevronPhillips Chemical Company
- Chicago Bridge & Iron
- Chiyoda Corporation
- CIFE Stanford University
- CITGO Petroleum
- CIV-Tek Corporation
- Cloudis Limited
- COADE, Inc.
- Collaborative Systems Group (CSG)
- Commint Inc
- Comos Industry Solutions Inc.
- ConocoPhillips
- ConocoPhillips Gas & Power
- Consolidated Contractors Company
- Coreworx Inc.
- CoSyn Technology
- CSA, Inc.
- D3 TECHNOLOGIES
- Dassault Systemes
- Dassault Systemes Americas Corp.
- Dassault Systemes Israel Ltd.
- Det Norske Veritas
- DNV
- Dow Chemical
- DS Delmia Corp.
- DS Solidworks Corp.
- DuPont
- Eastman Chemical Company
- ECAD Inc.
- ECE Design
- EDG, Inc.
- Edoxx Technical Services
- Emerson
- Engineering Advancement Association of Japan
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- Entergy Nuclear Inc.
- Environmental Intellect
- Epic
- ETS
- Eventsia Group
- eWorkspace Solutions, LLC
- Exact Metrology, Inc.
- ExxonMobil
- ExxonMobil Research & Engineering
- FARO
- FIATECH
- FirstEnergy Corporation
- Fluor Corporation
- FMC TEchnologies
- Foster Wheeler
- Foster Wheeler Energia Oy
- Foster Wheeler Global Power Group
- Foster Wheeler North America Corp
- Foster Wheeler USA Corporation
- Gas Liquids Engineering Ltd.
- Gerdau Special Steel
- Google
- GSN Technologies
- Harris Machine Tools
- Hatch
- Hellman & Freidman
- Hess Corporation
- Hi-Cad America LLC
- Hitachi, Ltd.
- Honeywell Process Solutions
- Horeshoe Group Inc
- Huntsman
- Hydrocarbon Engineering
- Hydrocarbon Processing
- IBM Corporation
- Industrial Info Resources
- Inelectra
- InfoAxis Solutions - Brazil
- Innovative Management Solutions, Inc. (IMS)
- INOVx Solutions
- INSTITUTO MEXICANO DEL PETROLEO
- Intellisum Inc
- Intergraph Canada Ltd.
- Intergraph Corporation
- Intergraph Corporation, Process, Power & Marine
- Intergraph Process
- Invensys Process Systems
- INVISTA S. a r.l.
- IT Engineering Ltd.
- Jacobs Engineering
- JGC CORPORATION
- KBR
- Kiewit Energy
- Kinder Morgan
- KLG Systel Ltd.
- L-Con Engineers Constructors
- Leglesco
- Leica Geosytems Inc
- Linbeck Group
- LONESTARLUCKYCO
- MatrixOne, Inc.
- Meridian
- Microsoft
- Middough Consulting
- Mitsubishi Heavy Industries, ltd.
- Mosaic Company
- Mustang Engineering, LP
- Nana Worley Parsons
- NNE Pharmaplan
- Norconsult Informasjonssystemer
- Noumenon Consulting Ltd.
- Octaga AS
- Offshore Consultants, Inc.
- Oracle
- Oracle Primavera
- Pathfinder, LLC
- PCA POSC Caesar Association
- PCS
- Petro Project Engineering, Inc.
- Petrobras
- Petrobras S.A.
- Petro-Canada
- Petronas Carigali
- PI Integrated Systems
- PIP - Process Industry Practices
- Pipings Solutions
- PipingSolutions, Inc.
- Point Geomatics
- POWER magazine
- Poyry Industry Oy
- Prism Management Consulting
- Procter & Gamble
- Procyon Supply Inc.
- PRSI
- PSRE Co (NTP Truboprovod)
- Quantapoint
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- R. Brooks Associates Inc
- Rand Worldwide
- Razorleaf
- Retired, Air Products and Chemicals
- Rohm and Haas Texas Inc
- RWE NPower
- S & B Engineers and Constructors, Ltd.
- Salof
- SBM Atlantia
- Sharecat Solutions AS
- SHAW Energy & Chemicals
- Shell
- Shell Downstream International US
- Siemens AG
- Siemens PLM
- SISGRAPH
- Skire Inc.
- SNC-Lavalin Engineers & Constructors
- SNC-Lavalin Inc.
- SPAR Point
- SPED
- SRI Consulting
- Stanley Consultants
- StatoilHydro ASA
- SUNGRACE
- Sunrise Engineering
- Sword Inc
- Synergis Software
- T3 Energy Services
- TATA
- Tech Soft 3D
- Technip
- Techno Media
- Tecna
- Tekla, Inc.
- Tellepsen
- Texas A&M University
- The Business Advantage Group plc
- The Buskop Law Group
- The Dow Chemical Company
- The Shaw Group Inc.
- The Shaw Power Group
- Toshiba America Nuclear Energy Corporation
- Toshiba Corporation
- Total Cad Systems, Inc.
- Toyo Engineering Corp.(China)
- Toyo Engineering India Ltd.
- Toyo Engineering Korea
- TPG
- Transocean
- Trimble Navigation, LTD
- Trinity Technologies Corporation
- Universal Ensco, Inc.
- University of Calgary
- University of Michigan
- URS Corporation, Washington Division
- URS-Washington Division
- Variation Reduction Solutions, Inc.
- Victaulic
- VRcontext S.A.
- Washington Division of URS
- Worley Parsons
- Yokogawa
- Z+F UK
- Zachry Engineering Corporation
- Zachry Holdings, Inc.
- Zeus Development Corp
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