Col. Sean P. Lucas, Chief of Staff

4th Infantry Division and Fort Carson

Col. Sean P. Lucas is from Strafford, New Hampshire, and received his commission as an infantry officer from the United States Military Academy in 2000, and subsequently began his military career upon graduating from the Infantry Officer Basic Course later that year.

Lucas’ most recent assignment was at Fort Wainwright, Alaska, where he commanded the 1st Brigade Combat Team, 11th Airborne Division (Arctic). Prior to this, he was at Joint Base Lewis-McChord, Washington, where he commanded the 2nd Battalion, 75th Ranger Regiment from June 2020 to June 2022 after attending the Joint Advanced Warfighting School (JAWS) in Norfolk, Virginia. Lucas’ other assignments include commander of 1st Squadron, 75th Cavalry Regiment, 2nd Brigade, 101st Airborne Division; senior operations officer (National Military Command Center, Pentagon), the battalion liaison officer, S3 and executive officer in 2nd Battalion, 75th Ranger Regiment; company commander, assistant S3 and training officer in 1st Battalion, 75th Ranger Regiment; company commander and plans officer in 2nd Battalion, 35th Infantry, 3rd Brigade Combat Team, 25th Infantry Division; and platoon leader and executive officer in 3rd Battalion, 505th Parachute Infantry Regiment, 3rd Brigade Combat Team, 82nd Airborne Division.

Lucas has deployed numerous times to Iraq, Afghanistan and Syria and in support of global contingency operations while serving in these assignments.

He holds a Bachelor’s of Science in civil engineering from USMA, a Master of Military Arts and Science from the U.S. Army Command and General Staff College and a Master’s of Science in operational strategy and planning from the National Defense University. He is also a graduate of the U.S. Marine Corps Expeditionary Warfare School, the U.S. Army Command and General Staff College and the Joint Advanced Warfighting School.

Lucas is married and has two children.