| Name | Affiliation | Occupation / Position Title | City | Country | State | |
|---|
| Mărginean, Ovidiu | Romanian College of Psychologists | Clinical Psychologist, Psychotherapist | Suceava | Romania | Suceava | View |
| Margrove, Eliza | epsychol.com | Chartered Psychologist & Counsellor | Kingsley | United Kingdom | Hampshire | View |
| Marie-Ève, Giroux | TÉLUQ | Psychologist | Montréal | Canada | Quebec | View |
| Marin, Ana Pilar | Other | Applied Behavior Analyst | São Paulo | Brazil | Sao Paulo | View |
| Marine, Juan | Private Psychotherapeutic Practice | Psychotherapist | Oakville | Canada | Ontario | View |
| Markkula, Sanna | Mielenhuolto Interventions Oy + University of Jyväskylä | Psychologist/Entrepreneur + Project researcher | Espoo | Finland | Uusimaa | View |
| Markon, Matthew | none | Psychotherapist | Pittsburgh | United States | Pennsylvania | View |
| Marks, Donald | Kean University | Associate Professor, Director of Clinical Training | Milford | United States | New Jersey | View |
| Marks, Evan | University of Maryland School of Social Work | Psychotherapist | Bethesda | United States | Maryland | View |
| Marquez, Francisco | Privat Practise | Psychologist | Cordoba | Spain | Córdoba | View |
| Marquez, Veronica | Private Practice | Clinician | Bogota | Colombia | Distrito Capital de Bogotá | View |
| Marrero, Christina | Emerging Light Therapy | Psychotherapist | Flourtown | United States | Pennsylvania | View |
| Marriott, Michael | ACT mental health | Senior Mental Health Clinician | Derby | Australia | Western Australia | View |
| Marron, Rodrigo | Centro gestaltico San Isidro | Engineer/Counselor | OLIVOS | Argentina | | 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 |
| Marshall, Amanda | Brighter Outcomes | Clinical Behaviour Analyst | MANLY | Australia | Queensland | View |
| Marshall, David | Kaiser Permanente | LMFT LMHC | Beaverton | United States | Oregon | View |
| Marshall, Freya | South West London and St George's NHS Mental Health Trust, London, UK | Child and Educational Psychologist, CBT Therapist, Clinical Supervisor and MHST Service Lead | SURBITON | United Kingdom | Surrey | 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 |
| Martin, Aiveen | GHR (Reg), Mental Health Europe (MHE). | Mental Health and Wellbeing Consutlant Trainer | Rapid City | United States | South Dakota | View |
| Martin, Fiona | takeACTion.me.uk | Counsellor/ Coach | Holywell | United Kingdom | Flintshire | View |
| Martin, Maeve | Adirondack Samaritan Counseling Center, Private Practice | Psychotherapist | Glens Falls | United States | New York | View |
| Martin, Ned | Spring Counseling PLLC | Licensed Professional Counselor | Lake Junaluska | United States | North Carolina | View |
| Martin, Staci | National Cancer Institute | Psychologist/Senior Associate Scientist | Bethesda | United States | Maryland | View |
| Martínez Ramírez, Ernesto | Instituto Mexicano de Terapias Basadas en Evidencia (IMTBE) | Director Académico | Nezahualcóyotl | Mexico | Mexico | View |
| MARTINEZ REY, MARÍA JOSE | si | PSICOLOGO | CIUDAD DE LA COSTA | Uruguay | Canelones | View |
| Martinez Rodriguez, Francisco | Clivi | Psicólogo Clínico y de la Salud | México | Mexico | Mexico | View |
| Martínez-Líbano, Jonathan | Universidad Andrés Bello | Psicología | Valparaíso | Chile | | View |
| Martinez, Jacob | Private Practice | Licensed Professional Counselor | Milwaukee | United States | Wisconsin | View |
| MARTINEZ, JOSE | LIBER TCC | SANCHEZ | CDMX | Mexico | Distrito Federal | View |
| Martinez, Laura | Miembro | Lic en psicología | Caba | Argentina | Capital federal | View |
| Martins, João | Modus Psicologia | Psychologist | João Pessoa | Brazil | Paraiba | View |
| Martins, Thais | Autarkia Clínica de Saúde | Clinical Psychologist | Sao Paulo | Brazil | Sao Paulo | View |
| Marzec, Mitchell | ACT Now Counseling | Licensed Professional Clinical Mental Health Counselor (LPCC) | Albuquerque | United States | New Mexico | View |
| Marzik, Estefania | psicologa | Psicologa | Buenos Aires | Argentina | Capital federal | View |
| Mascaro, Nathan | Atlanta CBT | Psychologist | Stone Mountain | United States | Georgia | View |
| Mashal, ABPP, Nehjla | Al-Ahliyya Amman University (AAU) | Clinical Psychologist | Amman | Jordan | Amman | View |
| Mason, Annette | Dept. of Veterans Affairs | LICSW | Saint Cloud | United States | Minnesota | View |
| Masterpasqua, Frank | Inst for Graduate Clinical Psychology, Widener University | Professor | Swarthmore | United States | Pennsylvania | View |
| Masterson Tilford, Stacy | Hamilton County Educational Service Center | Behavior Analyst | Cincinnati | United States | Ohio | View |
| Matacz- Szymanowicz, Iwona | NZOZ Diada NFZ Pyskowice, ODT Pozytywka | psychoterapeuta | Zabrze | Poland | śląskie | View |
| Mather, Doug | The Creation Company (2020) Ltd | Specialist in Human Behaviour | London | United Kingdom | London | View |
| Matheus, Daniela | CRP 08/12002 | Clinical Psychologist | Curitiba | Brazil | Parana | View |
| Mathis, Kimberly | VA San Diego Healthcare System | Staff Psychologist | Chula Vista | United States | California | View |
| Matisz, Jenna | New Horizons Therapy | Registered Social Worker/Psychotherapist | Kitchener | Canada | Ontario | View |
| Matsen Devitt, Julie | Springfield Behavioral of PA | Psychologist | Hazlet | United States | New Jersey | View |
| Matthijssen, Denise | Pivate practice | familytherapist and coach | Ingen | Netherlands | | View |
