Christopher is a corporate and government contracting consultant and an adjunct professor of law in the Program on Law and Government at the American University, Washington College of Law (WCL). In 2010, the President of the United States appointed Christopher as Special Assistant for Special Programs to the Director of Cost Assessment and Program Evaluation (CAPE) in the Office of the Secretary of Defense. As Special Assistant, he supported several sensitive budget, strategy, and program initiatives for Secretary of Defense Robert Gates including Front-End Assessments, restructuring and cancellation of Major Defense Acquisition Programs, and refinement the nation's defense strategy. Christopher provided confidential advice and counsel in key program areas throughout the senior-level decision-making process, including pre-decisional directives, policies, and budgeting decisions in the Planning, Programming, Budgeting, and Execution process. He was also responsible for handling a wide range of sensitive special assignments of great interest and concern to the Director, CAPE. This includes responding to congressional, legal, and Inspector General oversight and requests for information; preparing congressional testimony; and liaising between the Military Departments and agencies and offices of the Department of Defense.
Prior to his appointment, Christopher served as Counsel and Military Legislative Adviser to the Honorable Bill Nelson, the senior Senator of Florida and member of the Committee on Armed Services, Foreign Relations, and Select Committee on Intelligence. As a senior aide on the Senator's national security team, he provided advice and counsel on all issues related to constituent, industry, and legislative priorities related to national security, homeland defense, and veterans affairs. Christopher also represented the senator and executed his oversight and investigative priorities in high-level engagements with senior civilian officials and military officers. Before joining Senator Nelson's national security team, he was Legislative Assistant to the Honorable Melvin Watt, Congressman of the 12th District of North Carolina. While there, he handled a multitude of issues including agriculture, defense, energy, homeland security, transportation, and veterans affairs.
Christopher also served as law clerk to the Honorable Arthur B. Vieregg of the Nineteenth Judicial Circuit of Virginia. Subsequently, he was sworn in as an attorney-at-law in the Commonwealth of Virginia. In addition to his Juris Doctor degree, he holds undergraduate degrees in mathematics and philosophy from the University of North Florida (UNF). Before attending UNF, he was a Midshipman in the Naval Reserve Officer Training Corps at Tulane University with an impending commission as an Ensign in the U.S. Navy. Christopher forewent his commission, however, and enlisted as a nuclear, biological, and chemical warfare specialist in the U.S. Marines. His duty stations include posts in Okinawa, Japan, Australia, Alabama, North Carolina, Florida, and Washington, D.C. After serving seven years of exemplary service on active and reserve duty, Christopher was honorably discharged and entered on the retired list as a Sergeant of Marines in September 2000.