Commonwealth Consulting Corporation is a consulting firm in the Washington D.C. area. Founded in 1987 by Dr. Christopher Lehman, a former Special Assistant to U.S. President Ronald Reagan for National Security Affairs and former Director of the Office of Strategic Nuclear Policy at the Department of State, the Commonwealth Consulting Corporation is a government relations firm specializing in the Departments of Defense, State, and Homeland Security as well as their associated House and Senate Committees.