From 1984 to 1987 he returned to the University of Southern Mississippi, where he served as assistant professor of military science. After that, he spent a year in South Korea.
Hammond served as G3 for the British-led Allied Rapid Reaction Corps followed by duty as assistant division commander (support) of the 1st Cavalry Division during Operation Iraqi Freedom in 2003 in Iraq. He later served as the Army's Director of Operations, Readiness and Mobilization before taking command of the 4th Infantry Division on 19 January 2007.
Return to Southern Miss
Hammond currently serves as the Director, Military and Veterans Student Affairs at The University of Southern Mississippi. he is also Co-Chair of the MS Community Veterans Engagement Board.