[2][3] He worked for Massey Ferguson, Sperry Rand, and Waterloo Industries as an engineer before operating the eponymous Garrison Business Services.
During his tenure on the Iowa House of Representatives, Garrison was a student of the Drake University School of Law.
Garrison was appointed a Black Hawk County magistrate immediately after stepping down from the Iowa General Assembly.
While affiliated with the IRS, Garrison was believed to be the first African-American tax agent for the state of Iowa.
[1] Garrison died on April 3, 2004, of a heart attack at Iowa Methodist Medical Center in Des Moines.