Timothy D. Cullitan, M.S., LCPC, CADC

Timothy D. Cullitan, M.S., LCPC, CADC
Timothy D. Cullitan, M.S., LCPC, CADC

Lead Therapist

Timothy D. Cullitan, M.S., LCPC, CADC

Tim is Lead Therapist at Positive Sobriety Institute Chicago. With 30 years in the field of addiction treatment, Tim has extensive experience as a clinician and a manager working with dually diagnosed adults in the addiction IOP/PHP continuum of care. At PSI, he leads therapy and psychoeducational groups for recovering professionals incorporating Cognitive-Behavioral Therapy (CBT), Acceptance and Commitment Therapy (ACT) and psycho-dynamic approaches.

While Tim is very familiar with the traditional 12 step approach to recovery, he welcomes alternative self-help approaches having had a long-standing belief and practice that ‘one size doesn’t fit all’. Tim believes in the importance of meeting his patients where they are at and compassionately helping to facilitate growth towards greater fulfillment in life and lasting recovery.

Tim has spent his career working in Chicago hospital-based outpatient addiction treatment programs including Lutheran General Hospital, Rush Behavioral Health, Resurrection/Presence Behavioral Health, and NorthShore University HealthSystem at the Doreen E. Chapman Center.

Tim earned a B.A. from Loyola University, an M.S. from National Louis University, and is an Illinois Certified Alcohol/Drug Counselor. He also served as an adjunct professor at the College of Lake County.

In addition, Tim has been a yoga enthusiast for 30 years and is a certified Kundalini Yoga teacher. He enjoys spending time with his wife and daughter as well singing, playing piano, and writing songs with his rock and roll band.

Insurance Accepted


  • Located in the heart of downtown Chicago, Illinois steps off of the Magnificent Mile and accessible via two international airports located just 30-45 minutes away.
  • Our Medical Director, Daniel Angres, MD, is triple board certified in addiction medicine, psychiatry and neurology and addiction psychiatry.
  • Positive Sobriety Institute offers partial hospitalization (PHP), intensive outpatient therapy (IOP), and addiction after care programs.
  • Positive Sobriety Institute specializes in expert-delivered addiction assessment, rehabilitation and recovery services to highly motivated professionals and others who fit our milieu.
  • Positive Sobriety Institute's amenities include exercise physiology, walking, yoga, and acupuncture.
  • Positive Sobriety Institute's convenient downtown Chicago location is conducive to serving a myriad of client ancillary clinical needs, such as eating disorder treatment, specialized treatment and 12 step programs for other compulsive behaviors and other behavioral problems.
  • Positive Sobriety Institute offers first-class dining and cuisine within walking distance to the program.

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