Marshall was first elected to the lieutenant governor's office in 2018. She assumed office in January 2019.

Marshall was first elected to the lieutenant governor's office in 2018. She assumed office in January 2019. Marshall resigned as lieutenant governor on September 17, 2021, to become the senior adviser to governors in President Joe Biden's (D) administration.

Marshall was first elected Nevada state treasurer in 2006 and assumed office in January 2007. Marshall won re-election to her second, and final, four-year term on November 2, 2010. She was barred by term limits from seeking a third term as state treasurer. She served in this position until January 2015.