A Wilmington native, Johnson made Delaware history in 1968 as the first African-American principal of a non-segregated educational institution, P.S. Dupont High School. He was later the first superintendent of the Red Clay Consolidated School District.
Johnson is currently the president of the Redding House Foundation and remains an active member of the Episcopal Church of Saints Andrew and Matthew.
Since 1998, Delaware Technical Community College's Stanton and George Campuses have been celebrating Black History Month by honoring a member of the community for their personal and professional achievements.