Lieutenant Colonel Warren C. Cook Jr. serves as the Battalion Commanding Officer for Second Battalion, Fourth Marines, 5th Marine Regiment, 1st Marine Division.
Lieutenant Colonel Cook was born in Boston, Massachusetts in 1975 and commissioned in May 1998 after graduation from Williams College. From 1999-2001 he served in the 1st Marine Division as a Platoon and Company Commander in the 2d Battalion, 4th Marines, deploying with the 31st Marine Expeditionary Unit.
In 2001, he reported to 1st Marine Expeditionary Brigade, where he served as Aide to the Commanding General and Commander Task Force 58 during operations in southern Afghanistan.
In 2002, he was transferred to 1st Marine Division, where he served as Aide to the Commanding General during Operation Iraqi Freedom.
From 2004-2006, he was assigned to The School of Infantry at Camp Pendleton, California and served as a Company Commander and the Instructor Group Officer-in-Charge.
From 2006-2008, Lieutenant Colonel Cook returned to the 1st Marine Division and served as a Company Commander with 3d Battalion, 1st Marines during Operation Iraqi Freedom. In 2008, he reported to 2d Battalion, 1st Marines, and deployed to Iraq, as a Military Transition Team Leader, advising Iraqi Security Forces in the Al Anbar Province.
From 2009-2012 he commanded Recruiting Station Los Angeles. From 2013-2014 Lieutenant Colonel Cook served as the Junior Aide de Camp to the Commandant. Most recently, he was assigned to United States Pacific Command’s Strategy and Policy Directorate.
Lieutenant Colonel Cook is a graduate of the U.S. Army Infantry Captain Career Course, the Weapons Tactics Instructor Course, and the U.S. Naval Command and Staff College.