Coombs began his career in 2007 as a corrections officer for the Oregon Department of Corrections. In September 2013 he became a corrections officer at Kentucky State Penitentiary (KSP). While at KSP, Coombs was a member of the Corrections Emergency Response Team.
In March 2014 Coombs promoted to correctional sergeant and later that year promoted to correctional lieutenant. In 2019 Coombs transferred to LLCC and in May 2020 he promoted to correctional captain. While at LLCC, he was assigned to the Internal Affairs Department.
Coombs is a 2020 and 2022 recipient of the Luther Luckett Achievement Award.