Hollis Mann is an agent with the Department of Defense who is also a former member of the CID- Criminal Investigation Division and a former Lieutenant Colonel in the United States Army.
Born in an unknown State in America, Mann joined the United States and subsequently rose to the rank of Lieutenant Colonel with one of her previous postings including the 82nd Airborne Division.
She later joined the Army CID- Criminal Investigation Division.
NCIS Season 4
NCIS Season 5
NCIS Season 11
NCIS Season 12
Mann is a tall woman in her mid-forties with shoulder-length blonde hair and green eyes.