 He was also a director of the National Urban Coalition; National Bureau of Economic Research; Common Cause; Atlanta Chamber of Commerce; Martin Luther King Center for Social Change; and was a trustee of American University.He was co-chairman of the Interstate Committee on Human Resources and Public Services of the Southern Growth Policies Board, and was chairman of the Atlanta Regional Commission Health Manpower Task Force.Henderson was a founding member of the Black Academy of Arts and Sciences and was a fellow in the American Academy of Arts and Sciences.