B.A., College of William and Mary; J.D., University of Virginia; LL.M. Judge Advocate General's School; M.A. U.S. Army War College
Professor Castle graduated with high honors from the College of William and Mary in 1976 and received his law degree from the University of Virginia in 1979. He also is a graduate of the Command and General Staff College; The Judge Advocate General’s School, where he received an LL.M. in Military Law; and the U.S. Army War College, where he received an M.S. in Strategic Studies.
Professor Castle’s public service spans over 25 years, as both a military and civilian attorney, with a primary focus on administrative and federal appropriations law. He is currently a Deputy General Counsel for the Department of Defense, where he oversees the delivery of federal appropriations legal advice and services throughout DoD. He previously served as the Acting Principal Deputy General Counsel of the Army and as the General Counsel, Coalition Provisional Authority, Baghdad, Iraq, from May 2003, to July 2004. He is a Brigadier General (Retired) in the U.S. Army Reserve.