| Name | Affiliation | Occupation / Position Title | City | Country | State | |
|---|
| Margrove, Eliza | epsychol.com | Chartered Psychologist & Counsellor | Kingsley | United Kingdom | Hampshire | View |
| Marine, Juan | Private Psychotherapeutic Practice | Psychotherapist | Oakville | Canada | Ontario | View |
| MARINI, LARA | Consultorio Privado y Centro de Rehabilitación Farfalina | Profesora y Licenciada | Córdoba | Argentina | Cordoba | View |
| Markkula, Sanna | Mielenhuolto Interventions Oy + University of Jyväskylä | Psychologist/Entrepreneur + Project researcher | Espoo | Finland | Uusimaa | View |
| Marks, Donald | Kean University | Associate Professor, Director of Clinical Training | Milford | United States | New Jersey | View |
| Marmor, Robert | Steps to Progress LLC | Behavior Analyst | Houston | United States | Texas | View |
| Marques Tourinho, Ana | Clínica | Psicólogo | Ribeirão Preto | Brazil | | View |
| Marquez, Betsy | ABA | Board-Certified Behavior Analsyst | Honolulu | United States | Hawaii | View |
| Marquez, Veronica | Private Practice | Clinician | Bogota | Colombia | Distrito Capital de Bogotá | View |
| Marrero López, Carmen | Práctica privada | Psicóloga General Sanitaria | La Laguna | Spain | Santa Cruz de Tenerife | View |
| Marrez, Anne | AFSCC | psychologist | ATh | Belgium | Hainaut | View |
| Marrone, Sonia | Government of Manitoba | Senior Psychologist | Winnipeg | Canada | Manitoba | View |
| Marroquin, Natasha | Rethynk Coaching & Consulting | PhD, BCBA-D, LMFT | La Mirada | United States | California | View |
| Marsh, Daniel | Serene Health | Clinical Mental Health Counselor | Nortbrook | United States | Illinois | View |
| Marshall, Amanda | Brighter Outcomes | Clinical Behaviour Analyst | MANLY | Australia | Queensland | View |
| Marshall, Ryan | Private Practice | Independent Contractor | Victoria | Canada | British Columbia | View |
| Marshall, Sally | KBT Skeppsbron | authorized psychotherapist CBT | Gothenburg | Sweden | Västra Götalands län | View |
| Marshall, Sarah | Australian Psychological Society (APS) | BSc (Hon), PhD. Psychologist in private practice | Sydney | Australia | New South Wales | View |
| Marshall, Stephen | Cambridge Psychology Group/McLean Hospital/Harvard Medical School | Clinical Psychologist | Arlington | United States | Massachusetts | View |
| Martel, Marie-Eve | private practice | Registered Psychologist | Vancouver | Canada | British Columbia | View |
| Martin, Angelica | Private Practitioner | Licensed Professional Counselor | New Orleans | United States | Louisiana | View |
| Martin, Dan | St Mary's University, Twickenham | Sport and Exercise Psychologist | Windsor | United Kingdom | | View |
| Martin, Fiona | takeACTion.me.uk | Counsellor/ Coach | Holywell | United Kingdom | Flintshire | View |
| Martin, Savanna | Aspen Valley Counseling Services | LPC | DUMFRIES | United States | Virginia | View |
| Martin, Staci | True North Therapy and Training | Psychologist/Senior Associate Scientist | Bethesda | United States | Maryland | View |
| Martin, Tyler | Acrasy Advisors | Managing Director | Denver | United States | Colorado | View |
| Martínez Ramírez, Ernesto | Instituto Mexicano de Terapias Basadas en Evidencia (IMTBE) | Director Académico | Nezahualcóyotl | Mexico | Mexico | View |
| Martinez Sanchez, Jose | LIBER TCC | PSYCHOTHERAPIST | Ciudad de México | Mexico | Distrito Federal | View |
| Martinez, Jacob | Private Practice | Licensed Professional Counselor | Milwaukee | United States | Wisconsin | View |
| Martinez, Laura | Miembro | Lic en psicología | Caba | Argentina | Capital federal | View |
| Martinez, Robin | RadEd Collective | BCBA | Oakland | United States | California | View |
| Martinez, Robin | RadEd Collective | BCBA | OAKLAND | United States | California | View |
| Martino-Harms, Justin | Concentric Psychological Services | Psychologist | Providence | United States | Rhode Island | View |
| Martins, Karen | clinica | Psicóloga | Ponta Grossa | Brazil | | View |
| Martins, Maria João | Universidade de Coimbra | Psychologist | Coimbra | Portugal | Coimbra | View |
| Martz, Jan | SING | Psychiatrist | Zürich | Switzerland | Zurich | View |
| Marzec, Mitchell | ACT Now Counseling | Licensed Professional Clinical Mental Health Counselor (LPCC) | Albuquerque | United States | New Mexico | View |
| Mascaro, Nathan | Atlanta CBT | Psychologist | Atlanta | United States | Georgia | View |
| Mashal, ABPP, Nehjla | University of Jordan | Clinical Psychologist | Amman | Jordan | Amman | View |
| Maslinska, Anka | Otwarty Gabinet Terapeutyczny | Psychoterapeuta | Teulada | Spain | Alicante | View |
| Mason, Annette | Dept. of Veterans Affairs | LICSW | Saint Cloud | United States | Minnesota | View |
| Massey, Morgan | LifeStance | Mental Health Therapist | Edmond | United States | | View |
| Masterpasqua, Frank | Inst for Graduate Clinical Psychology, Widener University | Professor Emeritus | Swarthmore | United States | Pennsylvania | View |
| Mat Zin, Nora | International Islamic University Malaysia | consultant psychiatrist | Kuantan | Malaysia | Pahang | View |
| Mata, Sofía | Private Practice | Psicoterapeuta | El Marqués | Mexico | Queretaro | View |
| Matacz- Szymanowicz, Iwona | NZOZ Diada NFZ Pyskowice, ODT Pozytywka | psychoterapeuta | Zabrze | Poland | śląskie | View |
| Matejcich, Nicole | Private | Psychologist | Capital Federal | Argentina | Buenos Aires | View |
| Mather, Doug | The Creation Company (2020) Ltd | Specialist in Human Behaviour | London | United Kingdom | London | View |
| Mathews, Marielle | Delaware County Center for Psychological Services LLC | Psychologist | Havertown | United States | Pennsylvania | View |
| Mathis, Kimberly | VA San Diego Healthcare System | Staff Psychologist | Chula Vista | United States | California | View |
