| Name | Affiliation | Occupation / Position Title | City | Country | State | |
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| Hougen, Ronald | Mayo Clinic Health System-Decorah | Licensed Psychologist | Decorah | United States | Iowa | View |
| Tao, Chun | Mayo Clinic Arizona | Clinical Health Psychologist | Scottsdale | United States | Arizona | View |
| Roche, Anne | Mayo Clinic Rochester, MN | Senior Associate Consultant/Assistant Professor | Rochester | United States | Minnesota | View |
| Markota, Matej | Mayo Clinic Rochester, MN | Assistant Professor | Rochester | United States | Minnesota | View |
| Weiss, Karen | Mayo Clinic | Pediatric Pain Psychologist | Rochester | United States | Minnesota | View |
| Cassidy, Sarah | Maynooth University & Smithsfield Clinic | Educational Psychologist | Athboy, Co. Meath | Ireland | Meath | View |
| Cohen, Matthew | Matt Cohen PhD PLLC | Clinical Psychologist | Durham | United States | North Carolina | View |
| Case, Matt | Matt Case, LCMHC | Licensed Mental Health Clinician | Carrboro | United States | North Carolina | View |
| Charnas, Simcha | Matara | BCBA, Director | Lakewood | United States | New Jersey | View |
| Anchelone, Matias | Mat. N°8500 | Licenciado en Psicología | Rosario | Argentina | Santa Fe | View |
| Lloyd, Catherine | Master | psychologist | Sydney | Australia | New South Wales | View |
| Volpacchio, Ali | Massachusetts General Hospital | Licensed Clinical Psychologist | Boston | United States | Massachusetts | View |
| McAulay, John | Mashall Health Psychiatry | Psychologist / Assistant Professor | Huntington | United States | West Virginia | View |
| Sawyer, Mary | Mary Sawyer One to One Counselling | Principal Psychologist | | Australia | New South Wales | View |
| Kotova, Natalia | Marvis LLC | psychologist | Vladovostok | Russian Federation | | View |
| Mann, Mark | Martinsburg VA Medical Center | Cheif of Mental Health Service Line | Martinsburg | United States | West Virginia | View |
| Marston, Daniel | Marston Psychological Services | Clinical Psychologist | Monroeville | United States | Pennsylvania | View |
| Hienekamp, Marcel | married | therapist | Doorn | Netherlands | Utrecht | View |
| Lund, Joshua | Marriage and Family Therapy | Marriage and Family Therapist | Wilmington | United States | Illinois | View |
| Hagey, Derek | Marriage and Family Therapy | Program Manager | Eagle Mountain | United States | Utah | View |
| Ok, Zeynep | Marmara University | Psychologist | İstanbul | Turkey | Istanbul | View |
| Soares, Marina | Marina Psicologia | Psicóloga Clínica | Brasília | Brazil | Distrito Federal | View |
| Dunn, Marianne | Marianne G. Dunn, PhD | Licensed Psychologist | River Vale | United States | New Jersey | View |
| Silva, Eder | Maria Maria Espaço Saúde | Psicólogo Clínico | Vitória da Conquista | Brazil | Bahia | View |
| oliver, jonah | MAPS, AHPRA | Psychologist - Director | Mermaid Beach | Australia | Queensland | View |
| Van Styn, Melissa | MAPS, ACPA, AHPRA | Psychologist | Ballarat | Australia | Victoria | View |
| Berrick, Anthony | MAPS | Psychologist | Sydney | Australia | New South Wales | View |
| Crispim, Ana | Manicómio | Clinical psychologist and carreer consultant | Cascais | Portugal | Lisboa | View |
| Ramirez, Noel | Mango Tree Counseling & Consulting | Director | Philadelphia | United States | Pennsylvania | View |
| Rao, Puveshini | Malaysia Society of Clinical Psychology | Clinical Psychologist | Bandar Puchong Jaya | Malaysia | Selangor | View |
| KASUJJA, Rosco | Makerere University | Senior Lecturer | Kampala | Uganda | Kampala | View |
| Cassiday, Paumalu | Makawalu Health and Healing LLC | Therapist | Honolulu | United States | Hawaii | View |
| Maison, Sara | Maison Wellness | Therapist | St Petersburg | United States | Florida | View |
| Webb, Victoria | Main Line Therapy and Psychological Services LLC | Clinical Psychologist | Wayne | United States | Pennsylvania | View |
| Hopkins, Christina | Main Line Therapy and Psychological Services | Clinical Psychologist | Philadelphia | United States | Pennsylvania | View |
| Jumroonrojana, Karn | Mahidol University | Doctor | Bangkok | Thailand | | View |
| Moss, Heidi | Magnolia Counseling | LISW-CP Counselor | Spartanburg | United States | South Carolina | View |
| Glennon, Maggie | Maggie Glennon Coaching | Coach | Plymouth | United States | Massachusetts | View |
| Clark, Noel | Magellan Federal | MFLC | Jacksonville | United States | Florida | View |
| Alonso, Ángel | Madrid Institute of Contextual Psychology (MICPSY) | Psychologist | Madrid | Spain | Madrid | View |
| Ballantyne, Kelsey | Madison CBT | Licensed Psychologist | Madison | United States | Wisconsin | View |
| Austin, Jacob | Madison Behavioral Health Consultants | Founder, psychologist | Madison | United States | Wisconsin | View |
| Keating, Aaron | Madigan Army Medical Center | Primary Care Psychologist | Cheyenne | United States | Wyoming | View |
| Chi, May | Made it Clinic | Psychologist | Pialba | Australia | Queensland | View |
| Chu, Eddie | Mackenzie Health Hospital | Registered Social worker, Psychotherapist | Richmond Hill | Canada | Ontario | View |
| Lyseng, Annelise | MacEwan University | Counsellor | Edmonton | Canada | Alberta | View |
| Groeneweg, Claire | Maastricht University Medical Center | Therapeut Activiteitencentrum | Maastricht | Netherlands | Limburg | View |
| cohen, michal | MA | therapist | Haifa | Israel | Haifa | View |
| Sonshine, Sue | M.S.W. RSW | Social Worker | Toronto | Canada | Ontario | View |
| Lopez-Brooks, Erin | M.Ed., BCBA, IBA | Special Education Teacher, BCBA | Round Rock | United States | Texas | View |