Mark Baisley is a Colorado state senator representing the 4th district (2023-present) and aerospace engineer. Born in Hastings, Minnesota in 1955, Baisley holds a B.S. in computer information systems/business administration from Columbia College (1993). He is president of Slipglass, Inc., an engineering software firm, and previously served as a state representative. In January 2026, Baisley withdrew from the Colorado gubernatorial race to run for U.S. Senate instead, saying his background in the Colorado legislature made him better suited for the federal office.
Tech entrepreneur who founded and leads Slipglass, an engineering software company. Previously worked as senior engineer with Raytheon and senior systems engineer with Martin Marietta. Served on Columbia College Board of Trustees and as vice chair and finance chairman of the Republican Party of Colorado. No controversial statements documented in mainstream news coverage prior to 2025.