Susan grew up in Florida where she attended the University of Central Florida and worked in the field of advertising, before moving to Pennsylvania, joining her husband, and starting her family. In 1996, the Lontines moved to Denver, the childhood home of her husband, Chuck. She and Chuck have lived with their son, Ben, in Southwest Denver since 1998.
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. She is the Chair of the Health and Insurance Committee and on the Veterans and Military Affairs Committee.