Doctor Solis served 26 years in the U.S. Marine Corps, including tours of duty in Vietnam, where he was a company commander. After receiving his J.D., he was a Marine judge advocate and military judge. Following military retirement he earned a Ph.D., taught on the law faculty of The London School of Economics for three years, then joined the United States Military Academy’s Department of Law. For six years he headed West Point’s law of war program, receiving Phi Kappa Phi’s distinguished teaching award and, in 2006, was selected the Military Academy’s outstanding instructor (Apgar Award), after which he promptly retired again. He was a 2006-08 Library of Congress scholar in residence. He serves on the American Bar Association’s International Law Committee (Military Law sub-committee), and is on the editorial board of the ICRC’s International Review of the Red Cross.