Associate Professor in the Psychology Department at Ben-Gurion University of the Negev, a licensed clinical psychologist and approved family therapist and supervisor. He served as deputy director of the Center for Family Intervention Science at the Children's Hospital of Philadelphia in Pennsylvania (US). Prof. Diamond was involved in the development of Multidimensional Family Therapy (Liddle, 1990) aimed at treating adolescents suffering from drug dependence and behavioral disorders and is one the primary developers of Attachment-Based Family Therapy (ABFT), designed to treat depressed and suicidal teenagers. Prof. Diamond's research includes examining the efficacy of family based treatments and change mechanisms, emotional processing, and adapting attachment-based family therapy for the LGBT population. His research has been funded by the Israel Science Foundation, the United States-Israel Bi-National Science Foundation, the National Institute of Psychobiology in Israel, the American Foundation for Suicide Prevention, and other organizations. He trains and supervises ABFT therapists in Israel and worldwide. Prof. Diamond received his PhD in Counseling Psychology from Temple University, Philadelphia (US) in 1997 and completed his post-doctoral work in clinical psychology at the University of Pennsylvania School of Medicine in 1998.