Mr. Johnston was appointed to the Peoria County board on September 13, 2018. He is the President of Johnston Investment Counsel, which specializes in investment management and financial planning. He has served on the Peoria Public Library Board of Trustees, the Peoria Public Schools Foundation Board, First Federated Church Board, and the Peoria Academy Finance Committee. He is a member of the Rotary Club of Peoria. Mr. Johnston is married to Barb and is the father of two high school age boys.