Dr. Johll was a therapeutically certified optometrist at Wolfe Clinic Eye Centers in Fairfield, Iowa from 1996-2006. He is a graduate of the Illinois College of Optometry in 1990. He was a commissioned officer of the U.S. Air Force from 1980-1984. In 1979 received a Bachelor of Science in Nursing from Viterbo College, La Crosse, Wisconsin.
