*Sessions may be edited for content and to preserve confidentiality*
Albert Ellis, PhD, was an American psychologist who in 1955 developed Rational Emotive Behavior Therapy (REBT). He held M.A. and Ph.D. degrees in clinical psychology from Columbia University and American Board of Professional Psychology (ABPP). He also founded and was the President of the New York City-based Albert Ellis Institute for decades.
Based on a 1982 professional survey of US and Canadian psychologists, he was considered as the second most influential psychotherapist in history (Carl Rogers ranked first in the survey; Sigmund Freud was ranked third). Psychology Today noted, "No individual—not even Freud himself—has had a greater impact on modern psychotherapy."
Helen Singer Kaplan (February 6, 1929 – August 17, 1995) was an Austrian-American sex therapist and the founder of the first clinic in the United States for sexual disorders established at a medical school. The New York Times described Kaplan as someone who was "considered a leader among scientific-oriented sex therapists. She was noted for her efforts to combine some of the insights and techniques of psychoanalysis with behavioral methods." She was also dubbed the "Sex Queen" because of her role as a pioneer in sex therapy during the sexual revolution in 1960s America, and because of her advocacy of the idea that people should enjoy sexual activity as much as possible, as opposed to seeing it as something dirty or harmful. The main purpose of her dissertation is to evaluate the psychosexual dysfunctions because these syndromes are among the most prevalent, worrying and distressing medical complaints of modern times. 
Alexander Lowen, MD, was an American physician and psychotherapist. A student of Wilhelm Reich in the 1940s and early 1950s in New York, he developed bioenergetic analysis, a form of mind-body psychotherapy, with his then-colleague, John Pierrakos. Lowen was the founder and former executive director of the International Institute for Bioenergetic Analysis in New York City.
Judd Marmor, MD, was an American psychiatrist known for his role in removing homosexuality from the American Psychiatric Association Diagnostic and Statistical Manual of Mental Disorders. Judd was an adjunct Professor of Psychiatry at the University of California in LA, was Franz Alexander Professor of Psychiatry at the University of Southern California School of Medicine. he has practices medicine for more than 50 years, having graduated from Columbia University College of Physicians and Surgeons in 1933. He is past president of the American Psychiatric Association, American Academy of Psychoanalysis, and The Group for the Advancement of Psychoanalysis, and The Group for the Advancement of Psychiatry. He is recipient of the Bowis Award for Outstanding Achievements in Leadership in the Field of Psychiatry from the American College of Psychiatrists and the Founders Award from the American Psychiatric Association. Dr. Marmor served on the editorial board of 14 journals.He authored five books and co-authored one. He has written or co-written more than 300 scientific papers. Much of his writing has been on psychoanalysis and human sexuality.