Dr. O'Brien is a fellowship trained Neuro-Rhinologists and Endoscopic Skull Base Surgeon in the Division of Otolaryngology Head & Neck Surgery. His clinical interests include the care of complex nasal and sinus disorders with additional interests in facial pain, obstructive sleep apnea, and allergy/immunology. His research focuses on patient reported outcomes following sinonasal and skull base surgery as well as patient decisional conflict/regret when choosing a treatment plan.
Dr. O’Brien attended Creighton University, graduating magna cum laude from Creighton’s Honors Program (2010). He went on to obtain his medical doctorate and master of advanced studies in clinical research design from the University of California at Davis. Dr. O’Brien specialized in Otolaryngology – Head and Neck Surgery at West Virginia University, where he served as chief resident in his final year (2020).  Dr. O’Brien completed his fellowship in Neuro-Rhinology and Endoscopic Skull Base Surgery at the University of Alberta (2022).

Dr. O'Brien is board certified in both the United States and Canada, and is a diplomate of the American Board of Otolaryngology and a Fellow of the Royal College of Physicians and Surgeons of Canada. His practice is currently based out of CUMC-Bergan Mercy, but he does also see patients at Lakeside Hospital. He remains an active member on multiple committees within the American Academy of Otolaryngology, American Rhinologic Society, and North American Skull Bases Society. He currently serves as a reviewer for the Otolaryngology-Head and Neck Surgery, OTOpen, Annals of Otology, Rhinology and Laryngology, and World Journal of Otolaryngology.