Simpson is the general manager of the Rio Grande Water Conservation District and also served on the Adams State University Board of Trustees from 2015 to 2020. A native of the San Luis Valley, he is a fourth-generation farmer and rancher there. He graduated from the Colorado School of Mines in 1984.[4][5]
^Colorado Independent Legislative Redistricting Commission (March 18, 2022). "Colorado Senate District 6 (2021)"(PDF). State of Colorado. Retrieved January 10, 2023.