| Name | Affiliation | Occupation / Position Title | City | Country | State | |
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| Altshuler, Michael | AGPA, EGPS, NYSSCSW, SCTRI | Psychotherapist | Hastings-on-Hudson | United States | New York | View |
| Dantas Ruiz, Arlete | Agir Psicologia | CEO | Rio Verde | Brazil | Goias | View |
| Costa Bueno Subtil, Larissa | Agir Psicologia | Psicóloga clínica | Río Verde | Brazil | Goias | View |
| Wong, Chin Meng | AgapeServe.sg | Clinical Psychologist | Singapore | Singapore | | View |
| Bernard-Curie, Sylvie | AFTCC ACBS | Psychologist | Paris | France | Paris | View |
| Armand, Sylvie | AFTCC | Psychologist | Montesquieu-Volvestre | France | Haute-Garonne | View |
| Ramet, Lucie | AFTCC | Psychologist - CBT & ACT Therapist | Brighton & Hove | United Kingdom | | View |
| Afrigan, Thierry | AFSCC | Psychologue, Psychothérapeute | Paris | France | | View |
| Thompson, Caitlin | Affinity Counseling & Wellness, PLLC | LCMHCA | Winston Salem | United States | North Carolina | View |
| Stamper, Martha | Affiliates in Psychological Care | Psychologist | Schaumburg | United States | Illinois | View |
| Crea-Kammerer, Leslie | Advanced Psychology Services, LLC | Licensed Clinical Psychologist | Chicago | United States | Illinois | View |
| Hudson, Diane | Advanced Behavior Change | Behavior Analyst | Jackson | United States | Wyoming | View |
| Ruddock, Charles | Advance Healthcare | Clinical Psychologist | Bundoora | Australia | Victoria | View |
| Vontorčíková, Helena | Adult Mental Health | Psychological Practitioner | Přelouč | Czech Republic | Pardubický kraj | View |
| Galvin, Sue | Adult Community Mental Health, Te Whatu Ora Waitaha | Consultant Clinical Psychologist | Christchurch | New Zealand | Canterbury | View |
| Lycklama, Sandra | ADELI | psychologist | Cournon d'Auvergne | France | Puy-de-Dôme | View |
| KEMPE, Linda | ADELI | Clinician psychologist | Roquevaire | France | | View |
| Gili-tos, Célia | ADELI | Psychologue | Grenoble | France | Isère | View |
| Kole-Snijders, A.M.J. | Adelante | psychologist | | Netherlands | Limburg | View |
| Dawson, Paul | Adelaide Psychology Partnersice | Clinical Psychologist | St Peters | Australia | South Australia | View |
| Kemp, Jennifer | Adelaide Behaviour Therapy | Clinical Psychologist | Beulah Park | Australia | South Australia | View |
| McDonald, Alexa | Addenbrookes Hospital | Clinical Psychologist | | United Kingdom | | View |
| Rosenbach, Naomi | ADC psychological services | Clinical Psychologist | Lawrence | United States | New York | View |
| Luiz B pohl, Otavio | ADAPS | Family Physician | jau | Brazil | Sao Paulo | View |
| Toman, Peter | ACWA | counsellor; psychotherapist | Darwin | Australia | Northern Territory | View |
| Monneau, Marc | activité libérale | PSYCHOLOGUE - PSYCHOTHERAPEUTE | SAINTE GEMMES SUR LOIRE | France | Maine-et-Loire | View |
| Turner, Karen | ACTion Psychotherapy | Registered Psychotherapist | Toronto | Canada | Ontario | View |
| Lightstone, Nicky | ACTion Psychotherapy | Registered Psychotherapist (Qualifying) | Toronto | Canada | Ontario | View |
| MacIntire, Mae | Action Potential Behavioral Health and Sport Psychology | Psychologist | Grand Junction | United States | Colorado | View |
| Rizvi, Sophia | Action Behavior Centers | Board Certified Behavior Anaylst | Elgin | United States | Illinois | View |
| Altahif, Ayssa | Action Behavior Centers | Clinical Director | Kyle | United States | Texas | View |
| Manzur, Alejandrina | Actio Centro de Psicoterapias | Licenciada en Psicología | Asuncion | Paraguay | Asuncion | View |
| Garay, Johanna | Actio | Psicóloga | Asunción | Paraguay | Asuncion | View |
| Samsen, Monique | Act4kids | psychologist | Arnhem | Netherlands | Gelderland | View |
| Fondeck, Selah | ACT2Nourish | Dietician | Mechelen | Belgium | Antwerpen | View |
| Napolitano, Simone | ACT-Italia, IESCUM, ASCOC (Italy) | psychologist | Catanzaro | Italy | Catanzaro | View |
| SCAGLIA, FRANCESCA | ACT-ITALIA, IESCUM | DR | PIACENZA | Italy | Piacenza | View |
| Kiel, Valerie | ACT-Akademie.org | Psychologist & Peer-reviewed ACT | Maastricht | Netherlands | | View |
| Kruitbosch, Heleen | ACT Zwolle / Stichting Epilepsie Instellingen Nederland/ Angstmanagement | Psychosociaal ACT Therapeut | Zwolle | Netherlands | Overijssel | View |
| Van den Berghe, Tine | ACT with wisdom | Psychotherapist / coach | Sint-Job-in't-Goor | Belgium | Antwerpen | View |
| Bahr, Giselle | ACT Wellington | Clinical Psychologist | Wellington | New Zealand | Wellington | View |
| Canon, Luisa | ACT To Thrive, Institute for Effective Behavioral Interventions | Clinical Behavior Analyst/Licensed Clinical Psychologist | Parkland | United States | Florida | View |
| Pinkall, Tom | ACT therapist(teacher), Mindfulness (teacher-)trainer | Psychotherapist and Trainer | Mannheim | Germany | Baden-Württemberg | View |
| Thewissen, Roy | ACT therapist, trainer & supervisor | Psychologist (PhD) | Zutendaal | Belgium | Limburg | View |
| Steeman, Maaike | ACT Psychologen | gezondheidszorgpsycholoog | Utrecht | Netherlands | Utrecht | View |
| de Jager Meezenbroek, Eltica | ACT praktijk | Therapeut/coach | Utrecht | Netherlands | Utrecht | View |
| Aparicio, David | ACT Panamá | Psychologist | Panama | Panama | Panama | View |
| Wright, Joann | ACT One | Executive Director | Woodridge | United States | Illinois | View |
| Callahan, Patch | ACT of Living | Clinical Psychologst | Northcote | Australia | Victoria | View |
| Fahey, Steve | ACT of Living | Psychologist | Northcote | Australia | Victoria | View |