Keenan joined the GBI in 1973 and was appointed director of the agency in January 2003 by Governor Sonny Perdue. Prior to joining the GBI, he served as a patrolman with the DeKalb County Police Department (November 1972 - June 1973).
Keenan joined the Georgia Bureau of Investigation (GBI) in 1973 and was appointed director of the agency by Governor Sonny Perdue in January 2003, having previously served as a patrolman with the DeKalb County Police Department from November 1972 to June 1973.