Evan H. Johnson was born in Terre Haute, Indiana. He received his BS in Chemical Engineering in 1965 from the Rose-Hulman Institute of Technology. He received his JD in 1968 from the University of Illinois Law School. He served as an officer in the U.S. Army from 1968 - 1970.
He concentrated his practice in the areas of insurance defense (trial and appeals), civil litigation, estate planning, probate, and drainage and township law. He was a member of the Decatur Bar Association, Illinois State Bar Association, Illinois Defense Counsel, and a Fellow in the American College of Trial Lawyers.