| Name | Affiliation | Occupation / Position Title | City | Country | State | |
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| Wiemer, Kelsey | Power to Live Foundation | Psychotherapist | | United Kingdom | | View |
| Wierzbinski, Tom | BACB | BCBA | Chicago | United States | Illinois | View |
| Wiesenthal, Naomi | Forest City Psychological Services | Psychologist | London | Canada | Ontario | View |
| Wilder Schaaf, Kathryn | Richmond CBT Center | Dr. | Richmond | United States | Virginia | View |
| Wilder, Chip | Retired from practice at this time | Clinical Social Worker | Needham | United States | Massachusetts | View |
| Wilhelm, Laura | WVU Department of Beh Med & Psychiatry-Charleston Division | Associate Professor | CHARLESTON | United States | West Virginia | View |
| Wilkes, Ryan | Wasatch Psychological Services, LLC | Licensed Psychologist | Salt Lake City | United States | Utah | View |
| Wilks, Martin | Independent Practitioner (London & Suffolk) | Chartered Counselling Psychologist | Woodbridge | United Kingdom | Suffolk | View |
| Willaert, Sofie | Asspect | Psychotherapist | Lippelo | Belgium | Antwerpen | View |
| Willard, Ryan | Stevenson University | Assistant Professor | Stevenson | United States | Maryland | View |
| Willems, Robbin | Praktijk Perspectief Hasselt | Psychologist/psychotherapist | Hasselt | Belgium | Limburg | View |
| Williams, Charlotte | St Wilfrid's Hospice | Consultant in Palliative Medicine | Bosham Chichester | United Kingdom | West Sussex | View |
| 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, Jeffrey | Pepperdine University | Counselor | INGLEWOOD | United States | California | View |
| Williams, Julie | Private Psychology Practice | Licensed Marriage Family Therapist | GARDEN CITY | United States | Idaho | 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 |
| Wilson, Ann | unknown | Clinical Psychologist | | United States | | 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 |
| 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 Gendusa, Michelle | Private Practice | Therapist | Fayetteville | United States | Arkansas | View |
| Wise, Sara | University of Iowa Carver College of Medicine | Clinical Assistant Professor | Iowa City | United States | Iowa | View |
| Wiseman, Michelle | Achology | Holistic therapist and English language coach | Chester, Cheshire West and Chester | United Kingdom | | View |
| Wiśniewska, Agata | ACBS Poland | legal/therapist | Warszawa | Poland | mazowieckie | 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 |