According to Wiki:
Originally Posted by fettpett
Following attendance at the British Army Staff College, he returned to the Second Cavalry as operations officer, serving both at the squadron and regimental levels. In 1990-91 he deployed and fought with the Regiment in Operation Desert Storm, and later served on the staff of the Chief of Staff of the United States Army.
Lute commanded 1st Squadron, 7th Cavalry at Fort Hood, Texas from 1992-94. He then served on the Joint Staff in the Directorate for Strategic Plans and Policy, J-5, and held a War College Fellowship at the Atlantic Council in Washington, D.C.
Lt. Gen Lute and Deputy Assistant Secretary of Defense for Middle East Mark Kimmitt conduct a press briefing, February 9, 2007.
From 1998-2000 he commanded the Second Cavalry Regiment, part of XVIII Airborne Corps, at Fort Polk, Louisiana. In 2001, he was appointed Brigadier General. He served next as the executive assistant to the Chairman of the Joint Chiefs of Staff for 14 months before joining the 1st Infantry Division in Schweinfurt, Germany, as the Assistant Division Commander (Support). He commanded Multi-national Brigade East in Kosovo for 6 months in 2002 before being assigned to United States European Command in January 2003 as the Deputy Director of Operations.
In June 2004, Lute began more than two years as Director of Operations (J-3) at United States Central Command during which he oversaw combat operations in Iraq and Afghanistan as well as other operations in the Middle East, Central Asia, and the Horn of Africa. He was appointed to the rank of Major General in 2004, and to the rank of Lieutenant General in 2006. He assumed duties as Director of Operations, the Joint Staff, in September 2006.
 National security
On June 28, 2007, the Senate confirmed Lute to serve as the Deputy National Security Advisor. He remained in the position after his retirement from active duty in 2010. 
I like this bit.
On August 10, 2007, Lute stated that the United States should "consider" reinstating the military draft to relieve the "stressed" volunteer service from multiple tours of duty. This was immediately followed by a comment that it would be a major policy shift and that he did not see a current need for a draft.I agree.