| Name | Affiliation | Occupation / Position Title | City | Country | State | |
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| Williams, Gabrielle | OUSD | BCBA | Oakland | United States | California | View |
| Williams, Gwyneth | Self-employed private practice | Licensed Clinical Social Worker | Washington | United States | District of Columbia | View |
| Williams, Joseph | CBTMHC | Licensed Mental Health Counselor | Staten Island | United States | New York | View |
| Williams, Julie | Private Psychology Practice | Licensed Marriage Family Therapist | GARDEN CITY | United States | Idaho | View |
| Williams, Kelsey | Centre Counseling and Wellness | Pre-licensed Therapist | State College | United States | Pennsylvania | View |
| Williams, Lynn | Department of Defence (ARMY) | Clinical Psychologist | NOOSA HEADS | Australia | Queensland | View |
| Williams, Michael | Optimal Outcomes | Executive Director | Overland Park | United States | Kansas | View |
| Williams, Tracey | Private Practice Wollongong NSW Australia | Clinical Psychologist | Wollongong | Australia | New South Wales | View |
| Williamson, Garry | BAART Programs Oakland | Psychologist | Oakland | United States | California | View |
| Williamson, Julie | LPC | Founder/Therapist | Richmond Heights | United States | Missouri | View |
| Willimott, Rachel | Encompass Therapy | Licensed Clinical Social Worker | Oakland | United States | California | View |
| Willows, Jim | CPA | Dr | Winnipeg | Canada | Manitoba | View |
| Wills, Adam | Private Practice | Therapist | Columbus | United States | Ohio | View |
| Wills, Jawann | LCSW-C | Psychotherapist | Columbia | United States | Maryland | View |
| Wilson, Ann | unknown | Clinical Psychologist | | United States | | View |
| Wilson, Benjamin | Okanogan Behavioral Healthcare | Substance use disorder professional and crisis responder | Omak | United States | Washington | View |
| Wilson, Erica | Monarch Learning Group, LLC | Executive Director, Owner | Newport | United States | Oregon | View |
| Wilson, Lianna | Private Practice | Clinical Psychologist | Pittsfield | United States | Massachusetts | View |
| Wilson, Lisa | Southend Psychology and Ahead for Life | Practitioner Psychologist | Southend-on-Sea | United Kingdom | Essex | View |
| Winchester, Jake | UCHealth | Licensed Professional Counselor | Parker | United States | Colorado | View |
| WINE, IAN | OCSWSSW and OASW | Clinician | Markham | Canada | Ontario | View |
| Winsløv, Jan-Henrik | Psykologerne Aars ApS | Psychologist | Aars | Denmark | North Jutland | View |
| Winterfeld, Oleg | Rheinhessen Fachklinik Alzey | Psychologist | Alzey | Germany | Rheinland-Pfalz | View |
| Winterrowd LaVere, Molly | Hawai'i Center for Sexual & Relationship Health | Psychologist | Honolulu | United States | Hawaii | View |
| Winther Rojas, Hary | PRANA Center for evidence-based psychology | Clinical Psychologist and Psychotherapist | Cobán, Alta Verapaz | Guatemala | Alta Verapaz | View |
| Wirtz, Jan | ACBS | Psychotherapist | Berlin | Germany | Berlin | View |
| Wischenka, Danielle | Better Health Therapy | Founder | San Jose | United States | California | View |
| Wiscovitch, Ashley | Private Practice in Brooklyn | MHC-LP | Brooklyn | United States | New York | View |
| Wise, Sara | University of Iowa Carver College of Medicine | Clinical Assistant Professor | Iowa City | United States | Iowa | View |
| Witalewska, Agnieszka | Prywatna praktyka psychoterapeutyczna | Psychoterapeutka, Coach ICF PCC | Wrocław | Poland | | View |
| Witherden, Jennifer | University of Bristol | Health Psychologist and Research Associate | Cardiff | United Kingdom | | View |
| Witkin, Michelle | Private Psychology Practice | Psychologist | Valencia | United States | California | View |
| Witter, Brooks | Private Practice | Therapist, Parent Coach | Huxley | United States | Iowa | View |
| Witzig Jr, Ted | Apostolic Christian Counseling and Family Services | Clinical Director | Morton | United States | Illinois | View |
| Wnuk, Susan | University of Toronto, Department of Psychiatry; University Health Network | Clinical Psychologist | Toronto | Canada | Ontario | View |
| Woerner, Kathy | Cultivated Mental Health | LCSW | Milton | United States | Georgia | View |
| Woidneck Kieffe, Michelle | Woidneck Psychological, LLC | Licensed Psychologist | Omaha | United States | Nebraska | View |
| Wojcicki, Tom | Private Practice - Melbourne | Clinical Psychologist | South Yarra | Australia | Victoria | View |
| Wojdak, Christopher | Mount Tabor Counseling | Therapist and Clinical Supervisor | Arvada | United States | Colorado | View |
| Wolf, Jürgen | Ev. Beratungszentrum München e.V. | Counselor, Therapist | Muenchen | Germany | Bayern | View |
| Wolf, Mariska | BIG-register | GZ-psycholoog | Wijchen | Netherlands | Gelderland | View |
| Won, Paula | Healthy Therapy Online Care, LLC | ACT Therapist & RFT Educator | Honolulu | United States | Hawaii | View |
| Wong Chen, Corina | Centro Psicologico Sendero | Psicóloga clínica | Lima | Peru | Lima | View |
| Wong, Chin Meng | AgapeServe.sg | Clinical Psychologist | Singapore | Singapore | | View |
| Wong, Jessica | Castle Peak Hospital | Consultant | Hong Kong | Hong Kong | Tuen Mun | View |
| Wong, Josephine | Toronto Metropolitan University | Professor | Toronto | Canada | Ontario | View |
| Wong, Serena | St. Joseph’s Health Care London | Psychologist | London | Canada | Ontario | View |
| Wong, Tony | Institute of Psychological Health | Clinical Psychologist | Kowloon | Hong Kong | Wong Tai Sin | View |
| Wood, Kamini | AADP | Owner | Apex | United States | North Carolina | View |
| Wood, Kathryn | The Modalities Group, LLC | Drama Therapist / Mental Health Therapist | Annandale | United States | Virginia | View |