Johnson currently serves on the board of directors for The Alumni Association of Case Western Reserve University. Additionally, Johnson served CWRU’s New York Alumni Association as president, secretary and archivist, receiving the group’s Adrian Freeman Award in 1999. Johnson has served the community as a mentor for student teachers/graduate students at Queens College, City University of New York and St. John’s University, as president and trustee of the Schomburg Corporation, the chairman of the board for the Cinque Gallery and on advisory committees for Carnegie Hall's Weill Music Institute and the Romare Bearden Foundation.