Johnson made an early start in music when he began singing in his church choir at the age of six. His recording debut came six years later on Atlantic Records, which recorded his group the Humdingers, although the tracks remain unreleased. In 1961, and following a change in name to the Showmen, Johnson and the group recorded “It Will Stand”, a single for Minit Records. It was a chart hit in both 1961 and 1964. Although the Showmen recorded other offerings for Minit and Swan, including such hits as "39-21-46", they split up in 1968. Johnson attempted an abortive solo career before joining the then new Invictus label in Detroit, Michigan. Steered by Holland-Dozier-Holland, Johnson recruited Danny Woods, Harrison Kennedy, and Eddie Curtis and created Chairmen of the Board. Their debut single "Give Me Just a Little More Time" rose to #3 in the U.S. BillboardR&B chart in 1970. Additional hits included " Dangling on a String" and "Everything's Tuesday." Johnson commenced a career as songwriter with "Pay to the Piper," becoming a modest success for Chairmen of the Board. Other songs he wrote were successful when recorded by other musicians. These included the Grammy Award-winning "Patches" for Clarence Carter. Invictus Records labelmates Honey Cone recorded the Johnson penned tracks "Want Ads", "Stick Up," and "One Monkey Don't Stop No Show." Johnson also wrote "Bring the Boys Home" for Freda Payne. Chairmen of the Board's popularity diminished in the middle of the 1970s, although Johnson and Woods remained together re-billed as the Chairmen. Johnson tried a solo career again in 1976, and his debut solo album on Arista Records was a modest success. He teamed again with Woods in the following decade, making a living on the beach music circuit. In 1993, Johnson released the albumWhat Goes Around Comes Around. In recognition of the contribution that Johnson has made to American popular music, the Virginia General Assembly designated June 9, 2001 as General Johnson Day in Virginia. Johnson died on October 13, 2010 in suburban Atlanta, Georgia. His obituary in The New York Times reported that his family attributed his death to complications of lung cancer. Other obituaries did not mention lung cancer but did note that he was recovering from recent knee surgery.