- Trinity College - B.A.,
- DePaul University - M.A.,
- University of Minnesota - Ed.D.,
Johnson is the principal of Stillwater High School. He previously served as the interim executive director and president of the Minnesota Association of Secondary School Principals. He also worked as a school administrator in Dover-Eyota Secondary School, Dakar Academy (Senegal, West Africa), and Chisago Lakes High School.