Buchanan's numerous awards have included the National Council of Jewish Women Hannah G. Solomon Award, the Common Cause Public Service Achievement Award, the National Conference of Christians and Jews Brotherhood Award, and an award from the Self-Determination for D. C. National Coalition. He served on the Common Cause President's Council, the National Council of the U.S. United Nations Association, and the Board of Advisors and Speakers Bureau of the Close-Up Foundation. He also served as the board chairman of Fund-Balance, LLC and the Nexus Holdings Group.