prior to his retirement in 2017, kassinove was a full professor of psychology at hofstra university where he founded and served as director of the institute for the study and treatment of anger and aggression. he is a fellow of the american psychological association, a fellow of the association for psychological science, a certified school psychologist, a fellow of the albert ellis institute for rational emotive therapy, a board certified clinical psychologist (abpp), and a board certified cognitive and behavioral psychologist (abpp).