Mark Baisley

Baisley was born in Hastings, Minnesota. He earned a B.S. in computer information systems and business administration from Columbia College, later served 12 years on its Board of Trustees, and received the college’s Professional Achievement Award.⁠[1][2]

Baisley worked as a senior systems engineer at Martin Marietta and a senior engineer at Raytheon, and also worked for Hughes and NASANASAThe National Aeronautics and Space Administration (NASA) is the U.S. federal agency responsible for the civilian space program, aeronautics research and space science. Established by law in 1958 and headquartered in Washington, D.C., it has run programs including Mercury, the Apollo Moon landings, the Space Shuttle, the International Space Station and Artemis.Open the full entry’s Jet Propulsion Laboratory. He chaired the Colorado Space Business Roundtable.⁠[1][2]

He has been president of Slipglass, Inc. and Enspherics. Slipglass is a Littleton, Colorado, engineering software company that develops interactive systems visualization technology.⁠[1][3][2]

On November 6, 2018, Baisley was elected to the Colorado House for District 39 with 62.6% of the vote, succeeding Polly Lawrence; on November 3, 2020, he was reelected with 63.0%.⁠[1]

In the House he served on committees including Education, Health and Human Services, Appropriations, and Technology.⁠[1]

On November 8, 2022, Baisley was elected to Colorado Senate District 4 with 60.8% of the vote. He took office on January 9, 2023, for a term ending January 11, 2027, and did not seek reelection to the seat in 2026. The district includes Chaffee, Custer, Douglas, Fremont, Jefferson, Lake, Park and Teller counties.⁠[1][4]

In 2025–2026 he served on the state Senate’s Business, Labor, and Technology; Local Government and Housing; and Technology committees. His campaign website says he co-chairs the Aerospace and Defense Caucus in the Colorado Senate and introduced artificial-intelligence legislation focused on economic growth, innovation and privacy.⁠[1][2]

On January 5, 2026, Baisley withdrew from Colorado’s Republican gubernatorial primary and announced a campaign for the U.S. Senate against incumbent John Hickenlooper. He said Democratic state Sen. Julie Gonzales’s primary challenge to Hickenlooper suggested the incumbent might be vulnerable, and his campaign set a goal of raising $25 million.⁠[3]

In his statement he said Colorado “needs a U.S. Senator who will fight relentlessly for our Constitution, our economy, and our families,” adding that “Washington, not just Denver, is where this fight must be taken.”⁠[3]

In the June 30 Republican Senate primary Baisley ran unopposed after other candidates withdrew, winning the nomination.⁠[1][5]

During the general election campaign Baisley emphasized fiscal restraint, shrinking the federal government and market-driven approaches to affordability, housing and health care. His campaign had raised about $138,000 through mid-October.⁠[5]

On November 3 the Associated Press called the race within minutes of the polls closing, with Hickenlooper defeating Baisley to win reelection.⁠[5][6]

Baisley has served as vice chair and finance chairman of the Colorado Republican Party.⁠[1][3]

Mark Baisley for United States Senate: Official website: https://baisleyforsenate.com/ (opens in a new window).⁠[2]

X: Public account: https://x.com/MarkBaisley (opens in a new window).⁠[2]