Michael Terman, Ph.D. is Professor of Clinical Psychology in Psychiatry at Columbia University. He received his doctorate from Brown University in 1968.  He was a founder and president of the Society for Light Treatment and Biological Rhythms, the international organization of researchers and clinicians. He also founded and is president of the nonprofit Center for Environmental Therapeutics, an educational agency that serves both the general public and the profession. His two recent books are a clinical treatment manual, Chronotherapeutics for Affective Disorders (2009, 2013), and for general readers, Chronotherapy (2012, in hardcover/audio/e-book), and in paperback/e-book (2013), as Reset Your Inner Clock:The Drug Free Way to Best Ever Sleep, Mood and Energy (2013).
Niles Drake, M.D. is a psychiatrist who specializes in the diagnosis and treatment of mood, anxiety, and personality disorders, in addition to sleep and circadian problems.  He completed his psychiatric training at Columbia College of Physicians and Surgeons, where he trained with Dr. Terman in the use of chronotherapy.  He went on to complete a fellowship in emergency psychiatry at New York-Presbyterian Hospital, and additional training in psychodynamic psychotherapy at the Columbia Center for Psychoanalytic Training and Research.  Prior to entering psychiatry, Dr. Drake completed a pediatrics residency at Baylor College of Medicine.  He has worked extensively in college mental health at both Columbia University and Barnard College.

Margaret Mandel, Ed.D. is a clinical psychologist whose graduate work at Clark University concentrated on child development, leading to her doctoral degree in 1977 from Harvard Universtiy's Graduate School of Education. She pursued advanced clinical training at the Postgraduate Center for Mental Health, and New York University's Postdoctoral Program in Psychotherapy and Psychoanalysis.  Dr. Mandel has practiced for more than 30 years as a psychotherapist working with individuals and couples.  Chronotherapy patients have benefited from her guidance when there have been personal, family or occupational issues that impact the treatment of circadian rhythm disorders.