Marchman was born on a United States Air Force base while her father was serving as a pilot.
[1] She earned a Bachelor of Science degree in industrial and systems engineering from Georgia Tech.
[2] Prior to entering politics, Marchman worked as a business consultant and master scheduler.
She joined the Thompson School District in 2016, where she teaches math and computer classes part-time.
She was elected to the Colorado Senate in November 2022, defeating incumbent Republican Rob Woodward.