Jackman served as Director of Operations, United States Southern Command (USSOUTHCOM) from 2001–2003, concentrating mostly on anti-drug and anti-terrorism endeavours. He took command of the MDW in mid-2003 and subsequently the JFHQ-NCR in late 2004 at its official inception. While in this dual command capacity, Jackman organized the proceedings and security for the dedication of the World War II Memorial on the National Mall and its accompanying WWII reunion, organized former President Ronald Reagan's state funeral, served as the official escort to the former President's wife, former First Lady Nancy Reagan, and served as commander of the Joint Task Force-Armed Forces Inaugural Committee for President George W. Bush's 2005 Presidential Inauguration. Jackman was assigned as the Army's Chief of Legislative Liaison on July 21, 2005. He retired from that position, and the U.S. Army after 35 years of service, in July 2008.