- BabEng GmbH – Lars Babendererde
- CREG TBM Germany GmbH – Thomas Wu
- Denka Chemicals GmbH – Akihiro Hori
- Herrenknecht AG – Martin Herrenknecht
- Hölscher Wasserbau GmbH – Jaan Reimann
- Ingenieursozietät Gmbh – Prof. Dr.-Ing. Katzenbach
- Krampeharex GmbH – Wilhelm Nell
- Leviat GmbH – Ivica Duzic
- TLT - Turbo GmbH – Andreas Lahm
- VMT GmbH – Florian Werres
- WBI GmbH – Walter Wittke
- Alarp Consulting Group – Arnold Dix
- Pinssar – François Velge
- Sawaed Arab Company LTD – Homod Aldjeny
- 3G Gruppe Geotechnik Graz ZT GmH – Alfred Fasching
- BeMo Tunnelling GmbH – Norbert Fuegenschuh
- DSI Underground Austria GmbH – Günther Volkmann
- IC Consulenten Ziviltechniker GesmbH – Michael Propprenter
- Jäger Bau GmbH – Denise Flatz
- Porr Bau - Rainer Rengshausen
- 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 – Kiril Maslev
- WSP – Eric Peissel
- BY Consulting – Bai Yun
- China Railway 16th Bureau Group Co., Ltd – Wuxian Wang
- China Railway Academy Co., Ltd – Li Lin
- China Railway Tunnel Group Co. Ltd – Xiang Chang
- China Railway Construction Heavy Industry Co., Ltd – Tu Hongwei
- Shanghai Municipal Engineering Design General Institute (SMEDI) – Zhou Zhiyan
- Chinese Taipei Tunnelling Association - CTTA – Ming-Shen Shiah
- Asociacion Colombiana de Tuneles y Obras Subterraneas ACTOS – German Pardo Albarracin
- Kistec – Mi-Ri Cho
- COWI A/S – Soren Degn Eskesen
- Ramboll A/S – Søren Wegener Gamst
- Master Builders Solutions – Nick Chittenden
- 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 – Randall Essex
- Penetron International – Robert Lambermont
- Shannon & Wilson, Inc. – Robert A. Robinson
- Stantec – Michael P. Bruen
- Strata Wordlwide – Michael Rispin
- The Robbins Company – Lok Home
- Normet Group Oy – Ross Dimmock
- Sandvik Mining and Construction Oy – Pekka Nieminen
- Bessac – Bernard Theron
- Bouygues Travaux Publics – Bruno Combe
- CETU - Centre d'Études des Tunnels – Michel Deffayet
- Egis Structures et Environnement – Walet, Tournery
- EPC Groupe – Philippe Dozolme
- RBL-REI – G. Raimbault, S. Bouhours
- Soletanche Bachy Tunnels – Patrick Rolandetti
- Tractebel Engineering S.A. – Reza Taherzadeh
- Vinci Construction Grands Projets/ITS – François Renault
- Terratec – 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
- Edilmac dei Fratelli Maccabelli Srl – Luca Fomagalli
- Fama - Gustavo Bomben
- GEEG - Diego Sebastiani
- Italferr SpA – Andrea Pigorini
- Mapei SpA – Enrico Dal Negro
- Rocksoil SpA – Giuseppe Lunardi
- SYSTRA Spa - Paolo Cucino
- 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
- EFNARC – Roland Harbron
- HyperTunnel Limited – Pippa Carson
- Minova International Limited – Peter Assinder
- Nuclear Waste Services – Daniel Garbutt
- Shotcrete Services – Stuart Manning
- BeFo Rock Engineering Research – Patrick Vidstrand
- Jensen Ventilation AB – Thomas Hagalid
- Swedish Transport Administration – Thomas Dalmalm
- BG Ingénieurs Conseils SA – Fabian Rosenberg
- Contec Fiber AG – Mario Manser
- CUC - International Center for Geotechnics and Underground Construction – Felix Amberg
- 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 – Alberto Rey
- Swiss Tunnelling Consultants – Felix Amberg, Philippe Pons, Davide Fabbri
- 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