| Name | Affiliation | Occupation / Position Title | City | Country | State | |
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| Lyken, Anne Dorte | Soerlandets rehabiliteringssenter | Specialist in Clinical Psychology, CRDO | Flekkefjord | Norway | | View |
| Lynch, Francis | The Finding Meaning Practice | Director | Perth | Australia | Western Australia | View |
| Lyseng, Annelise | MacEwan University | Counsellor | Edmonton | Canada | Alberta | View |
| M.B., M.B. | Owner Gentleminds | mindfulness & compassion | trainer, coach | Haarlem | Netherlands | Noord-Holland | View |
| Mabry, Johanna | Resilience Elevated, PLLC | Lead Clinician | Ann Arbor | United States | | View |
| Macari, Cara | Child Mind Institute | Clinical Social Worker | New York | United States | New York | View |
| Macera, Michelle | Hilo Medical Center | Psychologist | Hilo | United States | Hawaii | View |
| MacFarland, Mari | PARClife | Director | Plymouth | United States | Michigan | View |
| Machado Doriguello, Wagner | -Private clinic | Psicólogo Clínico e Monitor de Clínica-escola | Indaiatuba | Brazil | Sao Paulo | View |
| MacIntire, Mae | Action Potential Behavioral Health and Sport Psychology | Psychologist | Grand Junction | United States | Colorado | View |
| Mackaronis, Julia | Quinault Indian Nation | Licensed Clinical Psychologist | Taholah | United States | Washington | View |
| Macke, Greg | Victory Academy | BCBA | Sherwood | United States | Oregon | View |
| Mackenzie, Helena | Psychotherapy and Resilience, PLLC | Clinical Psychologist | Saint Paul | United States | Minnesota | View |
| Mackie, Brett | Change Your Mind Psychology | Psychologist | POINT COOK | Australia | Victoria | View |
| Mackin, Michelle | National Health Service (NHS) | Specialist Counselling Psychologist | Burton on Trent | United Kingdom | Staffordshire | View |
| Maclaughlin, Rosemary | NASW | LCSW, Psychotherapist, Professor | Sacramento | United States | California | View |
| MacLeod, Bruce | not affiliated | Psychotherapist | Edmonton | Canada | Alberta | View |
| MacLeod, Sandra | Mosaic Behavioral Consulting | Sandra Mac Leod, Ph.D., BCBA-D, Behavior Analyst | Port Angeles | United States | Washington | View |
| Madden, Kym | Self Employeed | Counselor | MARCOOLA | Australia | Queensland | View |
| Maddison, Bridget | BABCP | CBT Therapist | Worcestershire | United Kingdom | Worcestershire | View |
| Madrigal-Bauguss, Jessica | NM VA Health Care System | Staff Psychologist | Albuquerque | United States | New Mexico | View |
| Madsen, Carrie | Atrium Health Wake Forest Baptist | Psychosocial Oncology Counselor | Charlotte | United States | North Carolina | View |
| Maero, Fabián | Grupo ACT Argentina | Psychologist | Ciudad Autónoma de Buenos Aires | Argentina | Buenos Aires | View |
| Mafi, Golnaz | JHU | Behavior Analyst | McLean | United States | Maryland | View |
| Magalhães, Tiago | Moldsoft Tecnologia | CRHO | Fortaleza | Brazil | Ceara | View |
| Magdy, Dahlia | Motivational Institute for Behavioral Health, LLC | Clinical Psychologist | Fort Lauderdale | United States | Florida | View |
| Magni, Cristina | School of behavioral psychotherapy ASCCO | Clinical Psychotherapist | Parma | Italy | Parma | View |
| Magomedov, Magomed | Argentina | Psychologist | Buenos Aires | Argentina | | View |
| Mahabir, Bindiya | BACB | BCBA/Autism Life Coach | Dublin | United States | California | View |
| Mahdavi, Abed | Ph.D in educational psychology, department of psychology and educational sciences, university of Tehran | Psychologist | Tehran | Iran, Islamic Republic of | Tehran | View |
| Maher, Michael | The Reeds Center | Clinical Psychologist, Director | New York | United States | New York | View |
| Mahleb, Eric | Burnout Help | Coach and trainer | Berlin | Germany | Berlin | View |
| Maichel, Katherine | University of Sheffield | Coach | Miami | United States | | View |
| Maidenberg, Michelle | Westchester Group Works | Psychotherapist | Harrison | United States | New York | View |
| Maier, John | Lesley University | Private Practice | Cambridge | United States | Massachusetts | View |
| Maingi, Lydiah | Kenyatta University | Lecturer | Nairobi | Kenya | | View |
| Maio-Aether, Nicholas | Empowered: A Center for Sexuality LLC | Sexual Behavior Analyst, Certified Sexuality Counselor, LGBTQIA+ Family Systems Specialist | Saint Louis | United States | Missouri | View |
| Maiojas, Maria Cecilia | psychology | psychology | Maldonado | Uruguay | Maldonado | View |
| Maisel, Max | Beachfront Anxiety Specialists | Psychologist | Redondo Beach | United States | California | View |
| Maison, Sara | Maison Wellness | Therapist | St Petersburg | United States | Florida | View |
| Maitland, Alison | British Association of Sport and Exercise Scientists | Psychologist | Oxford | United Kingdom | Oxfordshire | View |
| Maitland, Daniel | University of Missouri - Kansas City | Associate Professor | Kansas City | United States | Missouri | View |
| Majeres, MD, Kevin | Harvard Medical School | Psychiatrist (MD) | Cambridge | United States | Massachusetts | View |
| Mak, Yim Wah | School of Nursing, The Hong Kong Polytechnic University | Nursing/ Associate Professor | Hong Kong | Hong Kong | Yau Tsim Mong | View |
| Makadia, Dushyant (Shawn) | Sentiero | Postdoctoral Fellow | San Diego | United States | California | View |
| Mäkinen, Anna | Psykologipalvelu Prostellar | Occupational Health Psychologist | Vantaa | Finland | Uusimaa | View |
| Malcolm, Andrea | University of Western Sydney, School of Social Sciences and Psychology | Clinical Psychologist | Sydney | Australia | New South Wales | View |
| Malde-Zoradi, Brandon | Two Chairs | Clinician | North Hollywood | United States | California | View |
| Maldonado, Julieta | Consultorio particular | Psicóloga | Arequipa | Peru | | View |
| Malek, Cheryl | HPCSA | Counselling Psychologist | Gauteng | South Africa | Gauteng | View |