Membership
Our Members
ELF members are organizations and individuals worldwide who have joined the Foundation to develop, standardize, and promote the EXPRESS language family. Members participate and vote in the technical committees.
- United States (US) — 11
- United Kingdom (GB) — 3
- France (FR) — 2
- Japan (JP) — 2
- Norway (NO) — 1
- Austria (AT) — 1
Founding Members
Organizations designated by the Board as inaugural members of the Foundation.
Boeing
FoundingUnited States (US) · Member since 2022
Associate Technical Fellows contributing to ISO TC 184/SC 4 working groups on visualization and data exchange standards.
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General Electric
FoundingUnited States (US) · Member since 2022
Early contributor to STEP standardization and industrial data exchange standards development.
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NIST
FoundingUnited States (US) · Member since 2022
National Institute of Standards and Technology — proposed EXPRESS as an International Standard at ISO and led STEP development since inception.
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PDES Inc.
FoundingUnited States (US) · Member since 2022
Industry/government consortium that accelerates the development and implementation of STEP standards.
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STEP Tools
FoundingUnited States (US) · Member since 2022
Co-founded by David Loffredo. Developed software deployed in over a million CAD seats. Editor of ISO 10303-238 (STEP-NC) and Part 21.
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Jotne EPM Technology
FoundingNorway (NO) · Member since 2022
Developer of the EDMvisualExpress tool and EXPRESS Data Manager. Contributed the EDMsdk course materials to ELF.
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AFNeT Services
FoundingFrance (FR) · Member since 2022
Led by Jean Brangé. French organization focused on digital interoperability standards for industry, including EasySTEP and STEP Next initiatives.
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Ribose Limited
FoundingUnited Kingdom (GB) · Member since 2022
Provided operational and administrative support for the establishment and ongoing operations of the EXPRESS Language Foundation.
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Experts and practitioners participating in the Foundation's technical committees — including the original inventors and stewards of the EXPRESS language family.
Douglas Schenck
Inventor of EXPRESS
United States (US)
Project Leader, ISO 10303-11:1994 (with Bernd Wenzel)
Original inventor of the EXPRESS language at McDonnell Aircraft (1982). Co-author of the authoritative reference "Information Modelling: The EXPRESS Way".
Prof. Bernd Wenzel
Project Leader
Austria (AT)
Project Leader, ISO 10303-11:1994 (with Douglas Schenck)
Co-project leader of the first edition of the EXPRESS language standard, guiding it through international standardization at ISO.
Peter Wilson
Designer of EXPRESS-G & EXPRESS-X
United States (US)
Project Leader, ISO 10303-11:2004 (with David Loffredo)
Designer of EXPRESS-G (graphical notation) and EXPRESS-X (schema mapping). Co-author of "Information Modelling: The EXPRESS Way". Author of the EXPRESS Tutorial.
Thomas Thurman
President
United States (US)
Owner of TRThurman Consulting. Technical lead for all four editions of ISO 10303-210 (AP 210). ISO Excellence Award and PDES Bryan K. Martin Award recipient.
Allison Barnard Feeney
General Manager, PDES Inc.
United States (US)
2018 ANSI Finegan Standards Medal
General Manager of PDES, Inc. Key participant in STEP development since its inception. Dept. of Commerce Gold Medal recipient.
David Loffredo
VP Product Development, STEP Tools Inc.
United States (US)
Convener, ISO TC 184/SC 4/WG 11
Co-founder of STEP Tools Inc. Editor of ISO 10303-238 (STEP-NC) and Part 21. Led 20+ major software releases used in over a million CAD seats.
Jean Brangé
Président, AFNeT Services
France (FR)
Convenor, ISO/TC 184/SC 4/WG 21
Leads the EasySTEP and STEP Next initiatives for open-source STEP tooling. Pioneer in STEP AP242 deployment and LOTAR long-term archiving in aerospace.
Phil Spiby
Senior Consultant, Eurostep Limited
United Kingdom (GB)
Over 30 years in STEP and PLCS standardization. Key contributor to OASIS PLCS and European aerospace collaboration projects.
Stuart Galt
Associate Technical Fellow, Boeing
United States (US)
Convenor, ISO/TC 184/SC 4/WG 12
Associate Technical Fellow at Boeing with 25+ years in visualization and data exchange standards. Convenor of WG 12 at ISO/TC 184/SC 4, project lead of ISO/CD 14739-1 (PRC), and former Chair of OASIS WebCGM 2.1.
Yoshiaki Sonoda
Manager, DI Strategy & Planning Dept., Mitsubishi Heavy Industries
Japan (JP)
Convenor, ISO/TC 184/SC 4/WG 25 · Project Leader, ISO 15926-6
Manager at Mitsubishi Heavy Industries and leader of its International Standardization Strategy Task Force. 35 years of IT supporting over 700 products across power plants, shipbuilding, aerospace, and defense.
Become a member
Membership is open to organizations and individuals worldwide. See the categories, fees, and how to join.
Join the EXPRESS Language Foundation