| Name | Affiliation | Occupation / Position Title | City | Country | State | |
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| Mangnus, Paul | private practise | clinical psychologist | St. Jansteen | Netherlands | Zeeland | View |
| Manlick, Christopher | Iron Mountain VAMC- CBOC | Staff psychologist | Marquette | United States | Michigan | View |
| Mann-Wrobel, Monica | N/A | Licensed Psychologist | Chapel Hill | United States | North Carolina | View |
| Mann, Mark | Martinsburg VA Medical Center | Cheif of Mental Health Service Line | Martinsburg | United States | West Virginia | View |
| Manney, Joshua | Josh Manney Therapy | Licensed Marriage and Family Therapist | CAMARILLO | United States | California | View |
| Manns, Annelise | Providence Medical Group | Psychologist- primary care behavioral health provider | Damascus | United States | Oregon | View |
| Manser, Suzanne | Suzanne Manser, PhD | psychologist | Portland | United States | Oregon | View |
| Mansfield, Anita | ? | CMHN | Blue Mountains | Australia | New South Wales | View |
| Manso, Maria | Clínica de Psicología y Salud | Psicóloga clínica | Belo Horizonte | Brazil | | View |
| Mantas, Andriana | College of Registered Psychotherapists of Ontario (CRPO) & Canadian Professional Counsellors Association (CPCA) | Registered Psychotherapist | Toronto | Canada | Ontario | View |
| Manwaring, Jane | BABCP UK | Cognitive Behavioural Psychotherapist | Lancashire | United Kingdom | | View |
| Manzione, Raul | Instituto Par | Clinical Psychologist | São Paulo | Brazil | Sao Paulo | View |
| Manzur, Alejandrina | Actio Centro de Psicoterapias | Licenciada en Psicología | Asuncion | Paraguay | Asuncion | View |
| Marceau, Jean-Pierre | private practique | psychologist | Montreal | Canada | Quebec | View |
| Marcelle-Moor, La Chanda | FiDi Therapy | Psychotherapist | Brooklyn | United States | New York | View |
| Marcus, Sarah | NASW | Psychotherapist and Substance Abuse Counselor | Amherst | United States | Massachusetts | View |
| Mardani, Mohammad | PersianRFT | psychologist | Esf | Iran, Islamic Republic of | Esfahan | View |
| Marfleet, Fiona | British Psychological Society/HCPC | Registered Health Psychologist | Wotton-Under-Edge | United Kingdom | | View |
| Mărginean, Ovidiu | Romanian College of Psychologists | Clinical Psychologist, Psychotherapist | Suceava | Romania | Suceava | View |
| Margrove, Eliza | www.ElizaPsychol.com | Chartered Psychologist & Counsellor | Liphook | 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 |
| Mariné, Juan Ignacio | Private Psychology Practice | Psychotherapist | | Argentina | | View |
| Marinopoulou, Eleni | Willingness | Behaviour Analyst, ACT Practitioner | Zebbug | Malta | | View |
| Markkula, Sanna | Mielenhuolto Interventions Oy + University of Jyväskylä | Psychologist/Entrepreneur + Project researcher | Espoo | Finland | Uusimaa | View |
| Markon, Matthew | none | Psychoanalyst | Pittsburgh | United States | Pennsylvania | View |
| Markota, Matej | Mayo Clinic Rochester, MN | Assistant Professor | Rochester | United States | Minnesota | 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 |
| Marnay, Cécile | no one | Psychologist | Compiègne | France | Oise | View |
| Márquez Pla, Marina | COPC | Psychologist | Barcelona | Spain | Barcelona | View |
| Marquez, Francisco | Public System of Social Services- Cordoba | Psychologist | Cordoba | Spain | Córdoba | View |
| Marrero, Christina | Christina Marrero, ATR-BC, LPC | Psychotherapist | Flourtown | United States | Pennsylvania | View |
| Marriott, Michael | Headspace | Senior Mental Health Clinician | Cairns north | Australia | Queensland | View |
| Marrone, Sonia | Government of Manitoba | Senior Psychologist | Winnipeg | Canada | Manitoba | View |
| Marshall, Amanda | Brighter Outcomes | Clinical Behaviour Analyst | MANLY | Australia | Queensland | View |
| Marshall, Freya | Private Practice / Head Ways Psychology / Anna Freud Centre | Child and Educational Psychologist, CBT Therapist and Post-graduate Tutor / Lecturer | 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 |
| Marston, Daniel | Marston Psychological Services | Clinical Psychologist | Monroeville | United States | Pennsylvania | View |
| Marston, Kenneth | BACP and ACA | Counsellor/Group Facilitator | Katherine | Australia | Northern Territory | View |
| Marszalek, Kristen | College of Registered Psychotherapists of Ontario | Registered Psychotherapist | Newmarket | Canada | Ontario | View |
| Martel, Drew | Foundation 2 | Therapist | Cedar Rapids | United States | Iowa | View |
| Martin-Garcia, Cristina | BACP | ACT and CBT Therapist | Edinburgh | United Kingdom | | View |
| Martin, Grant | Liberation Counselling | Social Worker/Psychotherapist | Waterloo | Canada | Ontario | View |
| Martin, Staci | National Cancer Institute | Psychologist/Senior Associate Scientist | Bethesda | United States | Maryland | View |
| Martinez Munive, Renzo | Universidad Privada del Norte | Psychologist | Lima | Peru | Lima | 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 |