Theo Sandfort (in full, Theodorus G.M. Sandfort) is, since 2001, a research scientist at the HIV center for clinical and behavioral Studies, and is associate professor of clinical sociomedical sciences in psychiatry, Columbia University. Trained as a social psychologist, before joining the center, he was a tenured Associate Professor at the Department of Clinical Psychology at Utrecht University, the Netherlands, and later the Chairman of the Interfaculty Department of Lesbian and Gay Studies at Utrecht University. He was Director of the Research Program “Diversity, Lifestyles and Health”, at the Netherlands Institute of Social Sexological Research (NISSO). Dr. Sandfort is / was on the Editorial Board of several academic journals, including ''Archives of Sexual Behavior'', Ken Plummer's Sexualities, and ''Paidika''. He served as President of the the International Academy of Sex Research and the Dutch Society of Sexology and, in 2008, received the John Money Award from the Society of the Scientific Study of Sexuality for his research work.
Among MAPs, AAMs and their allies, Sandfort is known for his research on man/boy sexual relationships and early childhood sexuality.
