| Name | Affiliation | Occupation / Position Title | City | Country | State | |
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| Pascal-Claes, Francis | Community Mental Health Center 'Waas & Dender' | Clinical Psychologist-psychotherapist | Sint Niklaas | Belgium | | View |
| McCracken, Lance | Uppsala University | Professor of Clinical Psychology | Uppsala | Sweden | | View |
| Miselli, Giovanni | Fonazione Istituto Ospedaliero Fondazione Sospiro (Cremona), ACT-Italia; IESCUM | PhD, Clinical Psychologist and Psychotherapist PEER REVIEWED ACT TRAINER | Cremona | Italy | | View |
| A-Tjak, Jacqueline | Skils | Klinisch Psychologe | Emmen | Netherlands | | View |
| Sawyer, Mary | Mary Sawyer One to One Counselling | Principal Psychologist | | | | View |
| Gloster, Andrew | University of Lucerne | Clinical Psychologist/ Professor | Lucerne | Switzerland | | View |
| Morris, Eric | La Trobe University | Senior Lecturer | | | | View |
| Vahey, Nigel | Technological University Dublin | Lecturer in Psychology | Dublin | Ireland | | View |
| Lydell, Tommy | Scandinavian Institute for Evidence Based Psychology AB, Capio AB, Evimind AB | Licensed psychotherapist, Licensed healthcare counselor | Stockholm | Sweden | | View |
| Gillanders, David | University of Edinburgh | Senior Lecturer in Clinical Psychology | Edinburgh | United Kingdom | | View |
| Lloyd, Joda | Department of Professional Psychology | Head of Department | London | United Kingdom | | View |
| Gaynor, Scott | Western Michigan University | Psychologist/Professor/Co-DCT | | United States | | View |
| McHugh, Louise | University College Dublin | Professor | Dublin | Ireland | | View |
| Soo, Lai | BABCP (UK) | Cognitive Behavioural Psychotherapist | London | United Kingdom | | View |
| Bruyninx, Lieve | Factor Psy | psychotherapist/trainer/owner | Geleen | Netherlands | | View |
| Juárez, Patricia | University of Texas at El Paso - Universidad Autonoma de Ciudad Juarez | Training Director | El Paso / Cd. Juarez | Mexico | | View |
| Gronblad, Lisa | Private Psychology Practice | Psychologist/psychotherapist | STOCKHOLM | Sweden | | View |
| Kumano, Hiroaki | Waseda University | Professor of Clinical Psychology | Tokorozawa | Japan | | View |
| Kocovski, Nancy | Department of Psychology, Wilfrid Laurier University | Professor | | | | View |
| Colon-Torres, Yari | VA Caribbean Healthcare System | Staff Psychologist | San Juan | Puerto Rico | | View |
| Kjelgaard, Rikke | www.rikkekjelgaard.com | Psychologist, author, peer reviewed ACT trainer, chief rock'n'roller | Svedala | Sweden | | View |
| Morris, Miranda | True North Therapy and Training | Clinical Psychologist | | | | View |
| DuFrene, Troy | CSPP-SF | BCBA / Psychological Associate | | | | View |
| Handelman, Rob | Union Square Act Center, NYC | Clinical Psychologist | | United States | | View |
| McConnell, Chris | APCP | Psychotherapist / Counsellor | Dublin | Ireland | | View |
| Hulbert-Williams, Lee | University of Chester | Associate Professor | Chester | United Kingdom | | View |
| Bordieri, Michael | Murray State University | Associate Professor | | | | View |
| Callaghan, Glenn | San Jose State University | Professor of Psychology | | | | View |
| Oliver, Joe | Contextual Consulting/ University College London | Consultant Clinical Psychologist | London | United Kingdom | | View |
| Robinson, Peter | Possibilities | Psychotherapist | Edinburgh | United Kingdom | | View |
| Owen, Ray | Dr Ray Owen, Psychology Services | Consultant Clinical Psychologist (Cancer & Palliative Care / Health Psychology) | | United Kingdom | | View |
| Gibbons, Tom | Transitions | Therapist | Hamilton | Bermuda | | View |
| Halberstadt, Naftali | Freelancer: therapy, supervision, teaching, clinical research, program development | Psychologist Ph.D. | Jerusalem | Israel | | View |
| Moghaddam, Nima | University of Lincoln | Research Clinical Psychologist | | | | View |
| Waadt, Michael | Privatpraxis für Psychotherapie und Strategisches Coaching | Psychotherapeut (HPG) | Munich | Germany | | View |
| Dorey, Lucy | University of Southampton & Evolve Training and Therapy | Researcher, Counsellor, ACT Therapist and Supervisor | Southampton | United Kingdom | | View |
| Krnetic, Igor | Center for Cognitive Behavior Therapy | Director | Banja Luka | Bosnia and Herzegovina | | View |
| Kendra, Kathleen | Miriam Hospital | Clinical Psychologist | | | | View |
| Schraml, Karin | Stockholm University | Clinical psychologist, PhD | Vienna | Austria | | View |
| Thompson, Brian | Portland Psychotherapy Clinic, Research, & Training Center | Licensed Psychologist | | | | View |
| Corthouts, Joris | psychiatric institution St Hiëronymus | psychologist | sint niklaas | Belgium | | View |
| Leonard-Curtin, Aisling | ACT Now Purposeful Living | Counselling Psychologist | Wexford | Ireland | | View |
| Perez-Pedrogo, Coralee | Albizu University & University of Puerto Rico | Clinical Psychologist | San Juan | Puerto Rico | | View |
| Matthijssen, Denise | Pivate practice | familytherapist and coach | Ingen | Netherlands | | View |
| O'Connell, Manuela | Universidad de Favaloro | psychologist | Buenos Aires | Argentina | | View |
| Cankaya Sahin, Banu | glasgow university | Visiting Researcher | Glasgow | United Kingdom | | View |
| Ethington, Lanaya | Thrive Behavioral Health | Psychologist | | | | View |
| Kiel, Valerie | ACT-Akademie.org | Psychologist & Peer-reviewed ACT | Maastricht | Netherlands | | View |
| Gustavson, Norman | PARSA international NGO | clinical psychologist | Kabui | Afghanistan | | View |
| Loutsiou, Anthi | University of Cyprus | Director of Clinical Training | | | | View |