About Conall O'Cleirigh, PhD

Dr. Conall O'Cleirigh is a licensed staff psychologist in the Behavioral Medicine Service in the Psychiatry Department at Massachusetts General Hospital. His clinical specialties include the use of cognitive behavioral therapy (CBT) to treat depression and other mood disorders and in the treatment of post-traumatic stress disorder and the full spectrum of anxiety disorders. His clinical work also focuses on assisting patients with the management of acute and chronic medical illnesses. He has considerable clinical experience working with sexual minorities. Dr. O'Cleirigh is Assistant Professor in Psychology in the Department of Psychiatry at Harvard Medical School and is also a Research Scientist at the Fenway Institute at Fenway Community Health, Boston.

Dr. O'Cleirigh undertook his undergraduate work in Psychology and Philosophy at University College Dublin at the National University of Ireland. He went on to complete his masters degrees in Behavior Analysis at Southern Illinois University and in Clinical Psychology at the University of Miami, where he obtained his doctorate in Health Clinical Psychology in 2004 with a specialty in psychoneuroimmunology. He completed his pre-doctoral fellowship at Harvard Medical School/Massachusetts General Hospital.



Mass General Psychiatry: Behavioral Medicine Program
One Bowdoin Square
9th Floor
Boston, MA 02114
Phone: 617-726-3423

Medical Education

  • PhD, University of Miami
  • Fellowship, Massachusetts General Hospital
  • Fellowship, University of Miami

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Dr. O'Cleirigh's research interests are in developing and adapting cognitive-behavioral intervention technologies for application with medical populations, particularly among people living with HIV. As part of this research emphasis he is involved in developing primary and secondary HIV prevention interventions with particular application among gay and bisexual men. Dr. O'Cleirigh is funded through the National Institute of Mental Health (NIMH) to develop and test the efficacy of a novel cognitive behavioral therapy to address sexual risk and trauma symptom severity among gay/bisexual men with histories of childhood sexual abuse. He is also funded by the National Institute on Drug Abuse (NIDA) to develop and test an integrated smoking cessation program among people living with HIV.


  • O'Cleirigh C, et al. Patterns of E-Cigarette Use Among Primary Care Patients at an Urban Community Center. J Community Health. 2022 Feb;47(1):1-8. doi: 10.1007/s10900-021-01015-x. Epub 2021 Jul 2. PMID: 34215994.

    O'Cleirigh C, et al. Cognitive Behavioral Therapy for Trauma and Self-Care (CBT-TSC) in Men Who have Sex with Men with a History of Childhood Sexual Abuse: A Randomized Controlled Trial. AIDS Behav. 2019 Sep;23(9):2421-2431. doi: 10.1007/s10461-019-02482-z. PMID: 30993478; PMCID: PMC7271561.

    O'Cleirigh C, et al. Co-occurring psychosocial problems predict HIV status and increased health care costs and utilization among sexual minority men. J Behav Med. 2018 Aug;41(4):450-457. doi: 10.1007/s10865-018-9913-z. Epub 2018 Feb 6. PMID: 29411273; PMCID: PMC6031459.

    O'Cleirigh C, et al. Integrated Treatment for Smoking Cessation, Anxiety, and Depressed Mood in People Living With HIV: A Randomized Controlled Trial. J Acquir Immune Defic Syndr. 2018 Oct 1;79(2):261-268. doi: 10.1097/QAI.0000000000001787. PMID: 30212438; PMCID: PMC10041790.

    O'Cleirigh C, et al. Sexual minority specific and related traumatic experiences are associated with increased risk for smoking among gay and bisexual men. J Psychosom Res. 2015 May;78(5):472-477. doi: 10.1016/j.jpsychores.2015.02.004. Epub 2015 Feb 17. PMID: 25754971; PMCID: PMC4451223.

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