| Name | Affiliation | Occupation / Position Title | City | Country | State | |
|---|
| Ochsner Margolies, Skye | UNC School of Medicine | Clinical Psychologist/Associate Professor | Chapel Hill | United States | North Carolina | View |
| ODELL, SEAN | Beyond the Horizon, PLLC | Owner | Harrisburg | United States | Pennsylvania | View |
| Office, Nicholas | University of Chicago SSA | Clinical Social Worker | Chicago | United States | Illinois | View |
| Oggioni, Carlotta | ASCCO, Parma, Italy | Student | Parma | Italy | Parma | View |
| OGrady, Lisa | Embark Therapy | Private Practice Owner | Cobourg | Canada | Ontario | View |
| Oh, Timothy | Roots Through Recovery | Psychotherapist | Long Beach | United States | California | View |
| Ojala, Kristin | N/A | Behavior Analyst, Educational Consultant | Snohomish | United States | Washington | View |
| Ok, Zeynep | Marmara University | Psychologist | İstanbul | Turkey | Istanbul | View |
| Okumura-Clark, Alvaro | Universidad de Lima | Clinical Psychologist | Lima | Peru | Lima | View |
| Okwuosa, Ijoma | NOW Counseling | Therapist | New Haven, CT | United States | Connecticut | View |
| Oladipupo, Oyinkansola | Member Malta Chamber of Psychologist | Clinical Psychologist Practitioner | L-Imsida | Malta | | View |
| Olarte-Hayes, Sandra | Lime Tree Therapy, PLLC | Owner | Austin | United States | Texas | View |
| OldenKamp, Susan | CBT Center of Idaho | Licensed Clinical Professional Counselor | Caldwell | United States | Idaho | View |
| Oleyki, Homayoun | Esfahan | Student | Esfahan | Iran, Islamic Republic of | | View |
| Oliff, Susan | PRIVATE PRACTICE | Psychotherapist | Piermont | United States | New York | View |
| Oliveira, Ana Carmen | Instituto Par - Centro de Ciências e Tecnologia do Comportamento | Researcher | São Paulo | Brazil | Sao Paulo | View |
| oliveira, Cassia | brasileira | psicologa | porto alegre | Brazil | Rio Grande do Sul | View |
| Oliveira, Filipe | no one | self-employed clinical psychologist | Juiz de Fora | Brazil | Minas Gerais | View |
| OLIVEIRA, FLAVIO | NUTEC | PSICÓLOGO | Teresina | Brazil | Piaui | View |
| Oliveira, Giovanna | self-employed | Clinical Psychologist | São Paulo | Brazil | Sao Paulo | View |
| Oliver, Joe | Contextual Consulting/ University College London | Consultant Clinical Psychologist | London | United Kingdom | | View |
| oliver, jonah | MAPS, AHPRA | Psychologist - Director | Mermaid Beach | Australia | Queensland | View |
| Oliver, Mark | Cumbria, Northumberland, Tyne and Wear NHS Foundation Trust | Clinical Psychologist | Morpeth | United Kingdom | Northumberland | View |
| Olivera II, Arnaldo | American Board of Sexology Diplomate | Licensed Marriage and Family Therapist/Clinical Sexologist | Orlando | United States | Florida | View |
| Oliveros, Juan | Universidad Católica del Maule | Assistant Professor | Talca | Chile | Maule | View |
| Olkon, Sara | Clarity Relationship Therapy | psychotherapist | Chicago | United States | Illinois | View |
| Ollen, Elizabeth | UCLA Medical Center and Independent Private Practice | Psychologist | LOS ANGELES | United States | California | View |
| Olmos, Micaela | Universidad Nacional de Córdoba | psychologist | Córdoba | Argentina | Cordoba | View |
| Olson-Madden, Jennifer | Private practice in Denver,CO | Psychologist | Denver | United States | Colorado | View |
| Oluwatudimu, Ayo | PRIVATE PRACTICE | Psychotherapist | Leamington Spa | United Kingdom | West Midlands | View |
| Omidi, Shirin | clinic | Psychologist | Isfahan | Iran, Islamic Republic of | | View |
| Omrana, Mounia | Healing Trauma | Psychologist | Luxembourg | Luxembourg | Luxembourg | View |
| Ong, Clarissa | University of Louisville | Assistant Professor | Louisville | United States | Kentucky | View |
| Ong, Stella | Singapore Association for Counselling | Clinical Counsellor & Psychotherapist | Singapore | Singapore | | View |
| Ooijen, Nancy | Den Bosch | Coach | Uden | Netherlands | Noord-Brabant | View |
| Oonk, Wouter | To Act | Psychomotorisch therapeut / Owner | ZWOLLE | Netherlands | Overijssel | View |
| Opsahl, Noelle | PRIVATE PRACTICE | Psychologist | Hyattsville | United States | Maryland | View |
| oras, esra | İYİ GÜN Psikoloji- Good Day Psychology | Psikolog-Psikoterapist | istanbul | Turkey | Istanbul | View |
| Orbon, Stephanie | PRIVATE PRACTICE | Psychologist | San Diego | United States | California | View |
| Orchard, Melanie | PRIVATE PRACTICE | Clinical Psychologist | Godalming | United Kingdom | Surrey | View |
| Orcutt, Holly | Northern Illinois University | Professor | DeKalb | United States | Illinois | View |
| Ordyniec, Angela | Self -employed | Thrapist | Mount Pleasant | United States | South Carolina | View |
| Orellana, Mayra | Mayra Orellana | Licenciada en psicología | Hurlingham | Argentina | Buenos Aires | View |
| Oren, Amir | Bridges Therapy Centre | Psychologist | London | United Kingdom | | View |
| Oren, Yelena | PRIVATE PRACTICE | Licensed Psychologist | Reno | United States | Nevada | View |
| Orengo-Aguayo, Rosaura | Medical University of South Carolina | Assistant Professor | Charleston | United States | South Carolina | View |
| Orieta Santillan, Anel | Centro de Psicología Clínica y Psicoterapia | Psicologa | ciudad autonoma de buenos aires | Argentina | Capital federal | View |
| Orive, Maira | Universidad Nacional de Rosario | Psicóloga | Rosario | Argentina | Santa Fe | View |
| Orkopoulou, Efi | Eastern Michigan University | Psychologist | Athens | Greece | Attiki | View |
| Orme, Lee Ann | PRIVATE PRACTICE | LMFT | TUSTIN | United States | California | View |
