| Name | Affiliation | Occupation / Position Title | City | Country | State | |
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| Stanford, Marlena | Game Changer Group | mental health clinician | Phoenix | United States | Arizona | View |
| Stanley, Kerry | Kerry Stanley Counseling PLC | LICSW | Burlington | United States | Vermont | View |
| Stapleton, Rachel | ACT | LICSW, Owner | Issaquah | United States | Washington | View |
| Starkman, Charles | University of Michigan-Dearborn Counseling and Psychological Services (CAPS) | Assistant Director and Training Director | Dearborn | United States | Michigan | View |
| Start, Ellen | NFG, RBCZ | Psychosociaal Therapeut | Zuidbroek | Netherlands | Groningen | View |
| Statter, Orna | Clalit health services | Family Physician | Hulda | Israel | HaMerkaz | View |
| StClaire, Rachael | Rachael St.Claire PsyD LLC | Licensed Psychologist | Littleton | United States | Colorado | View |
| Stechow, Vanessa | CEFI- CENTER OF STUDIES OF FAMILY AND INDIVIDUAL; UNISINOS- UNIVERSITY OF VALE DO RIO DOS SINOS | Psicóloga | PORTO ALEGRE | Brazil | Rio Grande do Sul | View |
| Steele, Sophie | Compassionate Behavior Analysis, LLC. | Behavior Analyst Specializing in Applied RFT Language Instruction | Longmont | United States | Colorado | View |
| Steeman, Maaike | ACT Psychologen | Gezondheidszorgpsycholoog | Utrecht | Netherlands | Utrecht | View |
| Steenkamp, Elisabeth | Steenkamp Counseling | Psychosociaal Counselor | Bunnik | Netherlands | Utrecht | View |
| Stefanini, Stefano | private practise | Psychotherapist | Brescia | Italy | Brescia | View |
| Stein, Liz | Liz Stein, PsyD | Clinical Psychologist | Simsbury | United States | Connecticut | View |
| Steinberg, Brett | Comprehensive Neuropsychological Services | Forensic Neuropsychologist | Cheshire | United States | Connecticut | View |
| Steinberger, Henry | Henry Steinberger, PhD, LLC | Psychologist | Madison | United States | Wisconsin | View |
| Steinke, Steven | Harvard University | Private Practice | Cambridge | United States | Massachusetts | View |
| Steinkopff, Ralf | Praxis | Dipl. Psych. | Berlin | Germany | Berlin | View |
| Steinmark, Andy | Soundings®, LLC | Health Psychologist/Founder & CEO | Amherst | United States | Massachusetts | View |
| Stell, Caitlin | Stell Psychotherapy | Psychologist | Westport | United States | Connecticut | View |
| Stern, Karin | N/Q | Behavior Analyst | Tel Aviv | Israel | Tel-Aviv | View |
| Stern, Vivian Luna | Private Practice | Therapist | Manila | Philippines | | View |
| Sterniqi, Daniela | Privat Practise | psycotherapist | Milano | Italy | | View |
| Stevens, Bill | ACBS | Therapist | Timperley | United Kingdom | Cheshire | View |
| Stevenson, Jonah | Cira Center for Behavioral Health | LCSW | Chicago | United States | | View |
| Stevenson, Moire | Montreal Children's Hospital and Private Practice | Psychologist | Montréal | Canada | Quebec | View |
| Stiernerbielke, Sam | in patient treatment center | psychotherapist | Hässleholm | Sweden | Skåne län | View |
| Stisi, Caterina Alice | Studio creATTIVAmente | psychologist | Bologna | Italy | Bologna | View |
| Stoddard, Jill | The Center for Stress & Anxiety Management | Founder/Director | kuai | United States | Massachusetts | View |
| Stoll, Mark | Holistic CBT | Licensed Professional Counselor | COLUMBIA | United States | South Carolina | View |
| Stone, David | San Francisco Stress and Anxiety Center | Psychologist | San Francisco | United States | California | View |
| Storey, Whitney | KDH Counseling & Collective | University of Louisiana at Lafayette | Licensed Professional Counselor | Lafayette | United States | Louisiana | View |
| Stotts, Angela | University of Texas Medical School-Houston | Professor | Houston | United States | Texas | View |
| Strader, Benjamin | US ARMY | Clinical Psychologist | DuPont | United States | Washington | View |
| Strasser, Christine | Virginia Commonwealth University | Staff psychologist | Richmond | United States | Virginia | View |
| Stratman, Aaron | Midwest Behavioral Health | Psychologist | Lincoln | United States | Nebraska | View |
| Strickland, Emory | Equilibrium CBT | Psychologist | Seattle | United States | Washington | View |
| Stringer, Melissa | Private Practice | Licensed Professional Counselor | Sunnyvale | United States | Texas | View |
| Strisik, Suzanne | Independent Practice | Psychologist | Bellingham | United States | Washington | View |
| Stromer, Robert | George Brown College | Professor | Toronto | Canada | Ontario | View |
| Stroo, Laura | Het onderwijsatelier | Schoolpsychologist | Utrecht | Netherlands | | View |
| Strøm, Sverre | Copenhagen University | General practitioner | Nr. Åby | Denmark | Fyn | View |
| Struemph, Kari | University of Kansas Health System | Clinical Psychologist | Kansas City | United States | Kansas | View |
| Stuart, Simon | NHS Lanarkshire | Consultant Clinical Psychologist | Rutherglen | United Kingdom | South Lanarkshire | View |
| Stuckey, Robert | NASW | Outpatient Therapist | Raleigh | United States | North Carolina | View |
| Student, Ami | Private Psychology Practice | Psychologist | Los Angeles | United States | California | View |
| Sturges, James | California State Polytechnic University, Pomona | Professor (retired), Psychologist | Pomona | United States | California | View |
| Stuyck, Ann | Psypunt | Clinical psychologist | Moortsele | Belgium | Oost-Vlaanderen | View |
| Suarez, Anna | Private Practice | Psychologist | Portimao | Portugal | | View |
| Suárez, Lidia | Self -employed | Clinical Psychologist | Terrassa | Spain | Barcelona | View |
| Subbota, Anna | self-employed | Psychotherapist | Lutsk | Ukraine | | View |