| Name | Affiliation | Occupation / Position Title | City | Country | State | |
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| Hamilton, Kate | Private Practice | Clinical/Forensic Psychologist | Canmore | Canada | Alberta | View |
| Hamilton, Will | Asheville Integrated Behavioral Health | Psychologist | Asheville | United States | North Carolina | View |
| Hamlin, Jaclyn | Insight Behavior Partnership, LLC | Behavior Analyst | Arvada | United States | Colorado | View |
| Hamm, Ashley | Hamm Counseling | Counselor/Practice Owner | Houston | United States | Texas | View |
| Hammond, Anna | APA, IPA | License Clinical Psychologist | Aurora | United States | Illinois | View |
| Hampton, Justin | Arch Psychotherapy & Wellness | Clinical Social Worker | St. Louis | United States | Missouri | View |
| Handel, Jonathan | Danforth Psychology | MSW/RSW | Toronto | Canada | Ontario | View |
| Handelman, Rob | Union Square Act Center, NYC | Clinical Psychologist | New York | United States | New York | View |
| Handler, Mindy | Toronto, Canada | Registered social worker | Toronto | Canada | Ontario | View |
| Handley, Kevin | Private Practice | Germanna Community College | Licensed Clinical Psychologist | Professor of Psychology | Professional Certified Coach (ICF) | Fredericksburg | United States | Virginia | View |
| Haneda, Fumiki | Startline.Co.Ltd | Vocational Counselor | Tokorozawa | Japan | Saitama | View |
| Hankinson, Louise | NHS | Clinical Psychologist | Oxford | United Kingdom | | View |
| Hanley, Honora | Private Practice | Licensed Clinical Psychologist | Vancouver | United States | Washington | View |
| Hanna, Toni | Member AASW; Accredited Mental Health Social Worker | Clinical Social Worker - Private Practice | Strathalbyn | Australia | South Australia | View |
| Hannesson, Baldur | Icelandic Psychological Association | Clinical psychologist | Kópavogur | Iceland | Hofuoborgarsvaeoi utan Reykjavikur | View |
| Hannum, Alisa | Colorado College | Clinical Psychologist | Colorado Springs | United States | Colorado | View |
| Hansard, Christopher | Private Practice, London, England | Trauma and Health Psychotherapist, Physician of Tibetan Medicine | London | United Kingdom | London | View |
| Hansen, Golnaz | Private Practice | Clinical Psychologist | Marvin | United States | North Carolina | View |
| Hansson, Chris | CHADD | LPC, LMHC | Portland | United States | Oregon | View |
| Harbourne-Thomas, Andrew | Private Practitioner, Dublin | Counselling Psychotherapist, Coach | Foxrock | Ireland | Dublin | View |
| Harbrow, Jan | Guild of Australian Hypnotherapists | Counsellor | Bendigo | Australia | Victoria | View |
| Hardebeck, Emerson | HealthPoint | Behavioral Health Consultant | SeaTac | United States | Washington | View |
| Hardebeck, Lisa | Olympic Psychology Services | clinical psychologist | Tacoma | United States | Washington | View |
| Hardie, Shaun | Crosswinds Counseling | Therapist | Fort Wayne | United States | Indiana | View |
| Harford, Mary | American Counseling Association | Licensed Professional Counselor | | United States | | View |
| Hargrave, Jordyn | Missouri Department of Mental Health | Behavior Analyst | Saint Peters | United States | Missouri | View |
| Harper, Jim | RiverStone Wellness Center | Social Worker, Marriage and Family Therapist | Little Rock | United States | Arkansas | View |
| Harris, Amarylis | Reverse Psychology | Psychologist | Dubai | United Arab Emirates | Dubayy | View |
| Harris, Elisa | NA | Psychologist | | United States | | View |
| Harris, Findley | Specialists in OCD & Anxiety Recovery | Counselor | Richardson | United States | Texas | View |
| Harris, Kate | Independent Practice | Psychologist | Dover | United States | New Hampshire | View |
| Harris, Russell | Private Practice, Melbourne | Medical Practitioner, Psychotherapist | Melbourne | Australia | Victoria | View |
| Hart, Ashley | UMASS Chan Medical School | Clinical Psychologist | Worcester | United States | Massachusetts | View |
| Hart, Mitch | APS Clinical College Member | Clinical Psychologist. mob 0405007002 | Perth | Australia | Western Australia | View |
| Hart, Patrick | https://www.thehartcenter.com | Psychotherapist | Private Practice | Mental Health Evaluation and Treatment :: Seattle Washington | Family Drug Intervention and Drug Crisis Prevention Services) | Mesa | United States | Arizona | View |
| Hartholt, Renate | PsyValens | Basis psycholoog | Groningen | Netherlands | Groningen | View |
| Hassoun, Zeinab | NGO | Clinical Psychologist | Beirut | Lebanon | | View |
| Hatebur, Silvia | Praxisgemeinschaft Schlüsselberg | eidg. anerkannte Psychotherapeutin, MAS | Basel | Switzerland | Basel-Stadt | View |
| Haug, Nancy | Palo Alto University | Clinical Psychologist, Professor | Palo Alto | United States | California | View |
| Hauge, Erik | Erik Kyvik Hauge | Psykologspesialist | Oslo | Norway | Oslo | View |
| Hauge, Peter | Hauge Psychological Services, LLC | Psychologist | Atlanta | United States | Georgia | View |
| Haugen, Erin | Haugen Performance Consulting, PLLC | Licensed Psychologist (Clinical & Sport Psychology) | Grand Forks | United States | North Dakota | View |
| Havenstein, Federico | ACBS | Psychotherapist | Berlin | Germany | Berlin | View |
| Haverkamp, Jop | Jop | Trainer | Warnsveld | Netherlands | Gelderland | View |
| Hawkins, Elizabeth | Healthy Navigations | Clinical Psychologist | Lake Oswego | United States | Oregon | View |
| hawkins, Emily | Salt City Wellness | Psychotherapist | Salt Lake City | United States | Utah | View |
| Hawkins, Ruth | College for Registered Psychotherapist of Ontario | Psychotherapist | Ottawa | Canada | Ontario | View |
| Hawthorne, Arryn | Hawthorne Tree Psychotherapy, PLLC | Psychotherapist/Owner | Chicago | United States | Illinois | View |
| Hayden, Taylor | LCMHC | Adolescent, Marriage and Family Counselor | Mechanicsville | United States | Virginia | View |
| Hayes, Leslie | University of South Wales | Psychotherapist/Senior Lecturer | Bristol | United Kingdom | Bristol, City of | View |