Marsh started his coaching career in 2012 as a player development coach for the
Rio Grande Valley Vipers under
Nick Nurse for the 2012–2013 season. He went on to win a D-league championship with the Vipers in 2013. Marsh served as an assistant coach of the
Iowa Energy for the 2013-2014 D League season. Marsh was hired by the
Las Vegas Aces as an assistant coach to
Becky Hammon on March 14, 2022. He went on to win two championships with the Aces in
2022 and
2023. He also won a
commissioner's cup title in 2022. On November 3, 2024, Marsh was hired as the head coach of the
Chicago Sky, making his head coach debut in the WNBA. ==Head coaching record==