Our Associates
John T. Chirban, Ph.D., Th.D.
Dr. Chirban is a licensed clinical psychologist in Massachusetts and California (Ph.D., Boston University, University Professors program in Clinical Psychology and Oral Histories; Th.D., Harvard University in Medicine, Psychology, and Religion). As a Certified Health Provider, he serves as Director of Cambridge Counseling Associates and taught at Harvard Medical School and The Cambridge Health Alliance for more than 25 years. He designed courses in the areas of intimacy and sexuality, sexual dysfunction, family relationships, and spirituality and psychotherapy. Areas of his clinical specialization include identity formation, relationships and family issues, personality problems, health concerns, and issues of meaning and spirituality. Dr. Chirban has served as served as Guardian ad litem for the Massachusetts family court systems and was granted membership into the Society for Sex, Therapy, and Research. He has authored numerous book and professional articles and written two weekly blogs for Psychology Today on parenting and spirituality. He continues to serve on the Advisory Board of the Dr. Phil show which he was invited to participate since the program’s inception. Please visit drchirban.com to learn more about his training, publications, and research.
George (Djordje) N. Koldzic, M.D.
Dr. Koldzic is a Board Certified Psychiatrist with special interest in psychiatric care of patients with mood and anxiety disorders. He is a graduate of the General Psychiatry Residency Training Program at Tufts Medical Center in Boston and completed an Adams House fellowship in psychodynamic psychotherapy through the Brigham and Women’s Hospital/Faulkner Hospital Department of Psychiatry. Dr. Koldzic graduated from the Belgrade University School of Medicine, Belgrade, Serbia. He completed his post-graduate training in neurology and neuro-immunology at University Hospitals in Belgrade, Serbia and served as a post-doctoral research fellow in psychoneuroimmunology at Brigham and Women’s Hospital and UMass Medical Center. During his training and subsequent clinical practice in psychiatry, he received multiple teaching and exceptional practice awards. Dr. Koldzic is currently an assistant professor in psychiatry with Tufts School of Medicine. His clinical affiliation is through Tufts Medical Center’s Department of Ambulatory Psychiatry.
Dr. Wittmann
Dr. Wittmann is a licensed Board Certified Psychiatrist who received his M.D. at Washington University in St. Louis. He completed his residency training at the Massachusetts General Hospital (MGH)/McLean Hospital combined program. He served as the MGH Administrative Chief Resident and the MGH Consultation-Liaison Chief Resident during his training. Dr. Wittmann maintains a private practice in Cambridge and provides psychopharmacology, psychotherapy, combined treatment, and consultation. He is an instructor in psychiatry at Harvard Medical School and works in the MGH Bipolar Clinic and Research Program and the psychiatric emergency department at MGH. His clinical specialization includes mood and anxiety disorders as well as co-occurring medical and psychiatric illnesses.