- BabEng GmbH – Lars Babendererde
- CREG TBM Germany GmbH – Thomas Wu
- Denka Chemicals GmbH – Akihiro Hori
- Ductil GmbH - Ralf Winterberg
- F. Willich GmbH + Co. KG - Paulo Henrique Tsingos
- Herrenknecht AG – Martin Herrenknecht
- Hölscher Wasserbau GmbH – Jaan Reimann
- Ingenieursozietät Gmbh – Prof. Dr.-Ing. Katzenbach
- Krampeharex GmbH – Wilhelm Nell
- Leviat GmbH
- MC-Bauchemie - Lucas Krueger
- TLT - Turbo GmbH – Andreas Lahm
- VMT GmbH – Florian Werres
- WAYSS & FREYTAG INGENEURBAU AG - Klaus Rieker
- WBI GmbH – Walter Wittke
- Alarp Consulting Group – Arnold Dix
- Pinssar – François Velge
- Sawaed Arab Company LTD – Homod Aldjeny
- BeMo Tunnelling GmbH – Norbert Fuegenschuh
- IC Consulenten Ziviltechniker GesmbH – Michael Propprenter
- Jäger Bau GmbH – Denise Flatz
- Master Builders Solutions GmbH - Dr. Wolfgang Aldrian
- MinskMetroProjekt
- Adcos NV – Johan Devroe
- NV Bekaert SA – Benoît de Rivaz
- DEME INFRA NV – Jean-Charles Vereerstraeten
- Themag Engenharia – Tarcisio B. Celestino
- Geotechmin OOD – Tzolo Voutov
- Hydromat Ltd – Anton Maslev
- WSP – Eric Peissel
- MetaFLO Technologies Inc. - Michael Walker
- BY Consulting – Bai Yun
- China Railway Academy Co., Ltd – Li Lin
- China Railway Tunnel Group Co. Ltd – Xiang Chang
- China Railway Construction Heavy Industry Co., Ltd – Tu Hongwei
- Luoyang Gaofei Bridges and Tunnels Machinery Co.,LTD - GaoFei Huang
- Shanghai Municipal Engineering Design General Institute (SMEDI) – Zhou Zhiyan
- Sinodrills (Guizhou Sinodrills Equipment Co., LTD) - Jack Chan
- Chinese Taipei Tunnelling Association - CTTA – Ming-Shen Shiah
- Asociacion Colombiana de Tuneles y Obras Subterraneas ACTOS – German Pardo Albarracin
- Kistec – Mi-Ri Cho
- Dolenco Tunnel Systems – Johnny Poulsen
- COWI A/S – Soren Degn Eskesen
- Ramboll A/S – Søren Wegener Gamst
- Putzmeister Iberica S.A. – Isabel Artero
- Secegsa – Federico Fernández Alonso
- Aldea Services Inc. – Angel Del Amo
- Arup – Jon Hurt
- Brierley Associates Corporation – David Sackett
- Gall Zeidler Consultants, LLC – Vojtech Gall
- HNTB – Sanja Zlatanic
- Jacobs – Mark Johnson
- Mott MacDonald Ltd – Michael Saville
- Penetron International – Robert Lambermont
- Shannon & Wilson, Inc. – Robert A. Robinson
- Stantec – Michael P. Bruen
- Strata Wordlwide – Ian Turner
- The Robbins Company – Lok Home
- Normet Group Oy – Ross Dimmock
- Sandvik Mining and Construction Oy – Pekka Nieminen
- Bessac – Mr. Dominique Mazzieri
- Bouygues Travaux Publics – Bruno Combe
- CETU - Centre d'Études des Tunnels – Michel Deffayet
- Egis Structures et Environnement – Walet, Tournery
- EPC Groupe – Philippe Dozolme
- Incas Partners – Elena Chiriotti
- Soletanche Bachy Tunnels – Patrick Rolandetti
- Vinci Construction Grands Projets/ITS – François Renault
- Terratec Ltd.– Bruce Matheson
- Larsen & Toubro Limited Construction – Mr. Gangatharany
- NHSRCL – Ajai Kumar
- BarChip EMEA Ltd – Ralf Winterberg
- Netivei Israel - National Transport Infrastructure Company Ltd – Nissim Perez
- CPT Group Srl - Lorenza Rigamonti
- ATP s.r.l - Aniello A. Giamundo
- Edilmac dei Fratelli Maccabelli Srl – Luca Fomagalli
- Fama - Gustavo Bomben
- GEEG - Diego Sebastiani
- Italferr SpA – Andrea Pigorini
- Maccaferri Tunnelling S.r.l. – Nicola Faccioli
- Mapei SpA – Enrico Dal Negro
- Rocksoil SpA – Giuseppe Lunardi
- Seli Overseas - Remo Grandori
- SYSTRA Spa - Erica Calatozzo
- Fujita Corporation – Tatsuya Noma
- Hazama Ando Corporation – Nobuyuki Kawabe
- Kajima Corporation – Takashi Yamagishi
- Kumagai Gumi Co., Ltd. – Yoshihiko Katoh
- Maeda Corporation – Kazuhiko Mizutani
- Metropolitan Expressway Co., Ltd – Eiji Ochiai
- Mitsui Sumitomo Corporation - Ryuichi Okada
- Nishimatsu Construction Co., Ltd. – Kenichiro Nagata
- Obayashi Corporation – Satoshi Ito
- Okumura Corporation – Takayuki Ueki
- Penta-Ocean Construction Co., Ltd – Shuhei Kazusa
- Sato Kogyo Co., Ltd. – Kengo Kato
- Shimizu Corporation – Dohta Awaji
- Sumitomo Mitsui Construction Co., Ltd – Ryuichi Okada
- Taisei Corporation – Toshiaki Sudo
- Takenaka Civil Engineering & Construction Co Ltd – Keiichi Mori
- Tobishima Corporation – Isao Tsukiji
- Toda Corporation – Shingo Imamura
- Tokyu Construction Co., Ltd. – Masaya Miura
- Toyo Construction Co., Ltd. – Masahiro Matsuoka
- ArcelorMittal – Bruno Rossi
- SNED – Hanane Bounjoum
- Enprodes Management Consultancy B.V. – Han Admiraal
- Trelleborg Ridderkerk BV – André De Graaf
- Przedsiebiorstwo Budowy Kopaln PeBeKa SA – Robert Kozlowski
- Transbet Tunnel Construction Support – Michal Joszko
- Laboratorio Nacional de Engenharia Civil – Ana Maria Duarte
- Fibro Metals Srl – Ms. Jelena Dankovic
- HyperTunnel Limited – Pippa Carson
- Minova International Limited – Peter Assinder
- Nuclear Waste Services – Daniel Garbutt
- Rendel Limited – Melissa Dixon
- Shotcrete Services – Stuart Manning
- BeFo Rock Engineering Research – Patrik Vidstrand
- Jensen Ventilation AB – Thomas Hagalid
- Swedish Transport Administration – Thomas Dalmalm
- BG Ingénieurs Conseils SA – Fabian Rosenberg
- CUC - International Center for Geotechnics and Underground Construction – Felix Amberg
- EFNARC – Michael Kompatscher
- FiReP GmbH -Marc Schürch
- Gruner Stucky Ltd. – Alberto Arigoni
- Hagerbach Test Gallery Ltd. – Felix Amberg
- HBI Haerter AG – Peter Reinke
- Implenia Schweiz AG – Jens Classen
- Marti Holding AG - Honorary Member – Paul Balmer
- Rascor International Ltd. – René P. Schmid
- Sika Services AG, Tunnelling & Mining – Sarah Langley
- Swiss Tunnelling Consultants – Felix Amberg, Xavier Guigas, Davide Fabbri
- Dextra Manufacturing Co., Ltd. – Ms. Kansuda Visesthanakorn
- Metrostav a.s. – Ivan Hrdina
- Subterra a.s. – Vladislav Benes
- Dolsar Engineering Inc. Co. – H. Irfan Aker
- EMAY International Engineering and Consultancy Inc. – Hamdi AYDIN / Mehmet KABA
- Kordsa Teknik Tekstil A.Ş. – Yasa KILINC / Altan GOCMEN
- Üntel Kablolari San. ve Tic A.Ş. – Onur Serhat GÜNAN
- Fecon – Khoa Pham Viet
Allemagne - Germany
Australie - Australia
Arabie Saoudite - Saudi Arabia
Autriche - Austria
Azerbaïdjan - Azerbaijan
Belarus - Belarus
Belgique - Belgium
Brésil - Brazil
Bulgarie - Bulgaria
Canada - Canada
Chine - China
Chinese Taipei
Colombie - Colombia
Corée - Korea
Croatie - Croatia
Danemark - Denmark
Égypte - Egypt
Émirats Arabes Unis - United Arab Emirates
Espagne - Spain
États Unis d'Amérique - United States of America
Finlande - Finland
France - France
Grèce - Greece
Hong-Kong, Chine - Hong Kong, China
Inde - India
Indonésie - Indonesia
Iran - Iran
Irlande - Ireland
Israël - Israel
Italie - Italy
Japon - Japan
Luxembourg - Luxemburg
Malte - Malta
Maroc - Morocco
Norvège - Norway
Pakistan - Pakistan
Pays-bas - The Netherlands
Pologne - Poland
Portugal - Portugal
Roumanie - Romania
Royaume-uni - United Kingdom
Russie - Russia
Serbie - Republic of Serbia
Singapour - Singapore
Suède - Sweden
Suisse - Switzerland
Thailande - Thailand
République Tchèque - Czech Republic
Turquie - Türkiye
Vietnam – Vietnam