Following his command at the Ranger Training Brigade, Jackman served as the Director of Combined Arms and Tactics at the United States Army Infantry School at Fort Benning, as well as the Deputy J3 for Training and Readiness, United States Pacific Command (USPACOM), Hawaii. He was then assigned as Chief of Staff, 10th Mountain Division (Light Infantry), Fort Drum, New York, during which he participated as part of NATO's "Follow-on Force" in Operation Joint Forge, Bosnia-Herzegovina. Shortly thereafter he was made Assistant Division Commander for Support for the 10th Mountain Division.