Dr. Jack Frienhar has been an Investigator at CNS Network for over 7 years.  As well as working with clinical trials, he is also the Attending Psychiatrist at Brotman Hospital, Edgemont Hospital, and Torrance Memorial Hospital. For over 20 years, Dr. Freinhar has been a practicing Psychiatrist in Southern California. He has had extensive experience working with phase I-IV psychological clinical trials, including Schizophrenia, Bipolar, Insomnia, Schizoaffective, and Depression. Dr. Freinhar has published several articles in The Journal of Clinical Psychiatry, the International Journal of Psychiatry in Medicine, Psychosomatics, and the American Journal of Psychiatry. He is a member of the American Academy of Family Physicians, American Psychiatric Association and International Psychosomatics Institute. He is Board Certified by the American Board of Psychiatry and Neurology.

Previously, Dr. Freinhar was the Medical Director and Executive Director of Edgemont Hospital. He was an attending psychiatrist for various hospitals as well as a therapist for various clinics in California and New York. Dr. Freinhar graduated from the State University of New York of Binghamton and received his Doctorate at the University of Miami, School of Medicine.