Susan grew up in Florida, where she attended the University of Central Florida and worked in advertising before moving to Pennsylvania, joining her husband, and starting her family. In 1996, the Lontine's moved to Denver, the childhood home of her husband, Chuck. She and her family have lived in Southwest Denver since1998.
An enthusiastic and tireless advocate for Democratic values, she served as a Captain in House District 1 for four years. She worked at the Capitol in the office of Representative Jeanne Labuda and served as the Chief of Staff for Senator Irene Aguilar.
Susan has been the State Representative for House District 1 since 2014 and won re-election in 2018 and 2020. She is the Chair of the Health and Insurance Committee and on the Agricultural Committee.