| Name | Affiliation | Occupation / Position Title | City | Country | State | |
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| Sperber, Mark | Sperber Counseling, PC | Psychotherapist | Houston | United States | Texas | View |
| Spertus, Ilyse | Ilyse Spertus Psychological Services, PLLC | Clinical Psychologist | New York | United States | New York | View |
| Spidel, Alicia LeeAnn | University of Montreal | Psychologist | Vancouver | Canada | British Columbia | View |
| Spiller, Laura | Heights Couples Therapy | Psychologist | Houston | United States | Texas | View |
| Spinella, Valeria | Ordine psicologi Valle d'Aosta | Psicologo Psicoterapeuta | Aosta | Italy | Aosta | View |
| Spooner, Kane | Flinders University | Counsellor and Social Worker | Bridgewater | Australia | South Australia | View |
| Springer, Diana | Private Practice | Psychotherapist | Williamsville | United States | New York | View |
| Springer, Sabrina | Wild and Wander Therapy Services | Therapist | Spokane | United States | Washington | View |
| Srikanth, Gita | BACB | Founder Chairperson | Chennai | India | Tamil Nadu | View |
| St. Croix, Chelsea | NSHA | RN | Elmsdale | Canada | Nova Scotia | View |
| St. John, Carly | Carly St. John Psychotherapy | Mental Health Therapist | Rochester | United States | New York | View |
| Staats, Sarah | Loveland VA Outpatient Clinic | Clinical Psychologist | Loveland | United States | Colorado | View |
| Stabinski, Jonah | Jonah Stabinski, LCSW | Therapist | Cooper City | United States | Florida | View |
| Stachowiak, Weronika | Pracownia Psychologiczna „Pomocnia” | Mgr psychologii | | Poland | | View |
| Stafford-Brown, Jeanie | Griffith University | Counsellor | Meadowbrook | Australia | Queensland | View |
| Stahura, Cynthia | Sisu Psychological Services | therapist | SUN CITY | United States | Arizona | View |
| Stalmeijer, Chantal | eigen praktijk | ACT therapeut en Coach | Malden | Netherlands | | View |
| Stam, Aschwin | Stam ergotherapie en coaching | Occupational Therapist | Amsterdam | Netherlands | | View |
| Stamper, Martha | Affiliates in Psychological Care | Psychologist | Schaumburg | United States | Illinois | View |
| Stanchfield, Carol | Turning Point Community Programs | LMFT 43227, Director of AACT & AOT Program Services | GRASS VALLEY | United States | California | View |
| Stanfield, Hunter | Lipscomb University | Assistant Professor of Marriage and Family Therapy | Nashville | United States | Tennessee | View |
| Stanislavska, Tetyana | War Psychotrauma Institute | Psychotherapist, Psychoanalyst, Clinical Psychologist | Kyiv | Ukraine | Kyiv | View |
| Stapel, Frederiek | practice | psychologist | Haarlem | Netherlands | Noord-Holland | View |
| Starkman, Charles | University of Michigan-Dearborn Counseling and Psychological Services (CAPS) | Assistant Director and Training Director | Dearborn | United States | Michigan | View |
| Statter, Orna | Clalit health services | Family Physician | Hulda | Israel | HaMerkaz | View |
| Stecco, Juan | Neuro Ability neurorehabilitación - Universidad Nacional de Córdoba | Licenciado en Psicologia | Cordoba | Argentina | Cordoba | 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. | Precision Teacher & Behavior Analyst | Longmont | United States | Colorado | View |
| Steeman, Maaike | ACT Psychologen | gezondheidszorgpsycholoog | Utrecht | Netherlands | Utrecht | View |
| Steenkamp, Elisabeth | Steenkamp Counseling | Psychosociaal Counselor | Bunnik | Netherlands | Utrecht | View |
| Steenwyk, Mark | Pine Rest Christian Mental Health Services | Psychologist | caledonia | United States | Michigan | View |
| Steer, Jose | Private Practice | (Company)counselor/Coach | Glasgow | United Kingdom | Glasgow City | View |
| Stefanović, Anja | University of Belgrade | psychologist | Belgrade | Serbia | Srbija | View |
| Steinbach, Sarah | University of Chicago, School of Social Service Administration | Counselor | Chicago | United States | Illinois | 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 |
| Steininger, Eric | UNIVERSITY OF PITTSBURGH | Staff clinician | Gibsonia | United States | Pennsylvania | View |
| Steinke, Steven | Harvard University | Private Practice | Cambridge | United States | Massachusetts | View |
| Steinkopff, Ralf | Praxis | Dipl. Psych. | Berlin | Germany | Berlin | View |
| Steinwachs, Joanne | Private Practice | Clinical Social Worker | Denver | United States | Colorado | View |
| Stendardo, Emiliana | SPC-APC / SITCC / AISCC | PhD | Roma | Italy | Roma | View |
| Stephens, Jennifer | Stephens Behavior Consulting | Clinical Supervisor | Shelbyville | United States | Kentucky | View |
| Stepien, Kasia | Mental Freedom Counselling | Registered Clinical Counsellor | Merville | Canada | British Columbia | View |
| Stepp Triebert, Jenilee | Mindful Behavior, llc | BCBA | Richmond | United States | Kentucky | View |
| Sterk, Lisa | Perry Point VAMC | Psychologist | Perry Point | United States | Maryland | View |
| Stern, Karin | N/Q | Behavior Analyst | Tel Aviv | Israel | Tel-Aviv | View |
| Stevenson, Cleo | Australian Counselling Association | Psychotherapist | Victor Harbor SA | Australia | South Australia | View |
| Stevenson, Moire | CIUSSS Centre-Ouest | Psychologist | Montréal | Canada | Quebec | View |
| Stević, Branislava | REBT PRAXIS CENTAR | Psychologist/Psychotherapist | Novi Sad | Serbia | Srbija | View |
| Stewart, Jeanine | Therapy with Jeanine | Psychotherapist | Philadelphia | United States | Pennsylvania | View |