Col. Feeney was assigned to Barksdale AFB in July 2006. He was the Element leader of the Life Skills Support Center before becoming the Flight Commander of Behavioral Health Services Flight (now the Mental Health Flight) in April 2007. He experienced his second deployment to Baghdad, Iraq from August 2007-February 2008 augmenting the Army Mission in the International Zone in Support of Operation Enduring Freedom. Col. Feeney received the Army Commendation Medal in partial recognition of his accomplishments during his last deployment. Col. Feeney pinned on the rank of Full Colonel May 16, 2009, and he honorably retired from the Air Force October 1, 2012.

Col. Feeney joined the Brentwood Hospital team on July 9, 2012, as the Adolescent Program Director and Employed Psychiatrist. He served as Medical Director for Brentwood Hospital from September 2013 until February 2024.

Col. Feeney is a fellow member of the American Academy of Child and Adolescent Psychiatry (AACAP) and a member of the American Academy of Psychiatry and the Law (AAPL). He is quadruple board certified by the American Board of Psychiatry and Neurology (ABPN) in General Psychiatry with Added Qualifications in Forensic Psychiatry, Child and Adolescent Psychiatry and Psychosomatic Medicine.