Lambert practiced law in
Mount Vernon, Kentucky. During that time, she also served as an assistant commonwealth's attorney and city attorney for the City of Mount Vernon. She filed to run on February 1, 2018. She easily won the top-two primary in May 2018, with her and her nearest opponent Daniel Ballou advancing to the general election. On November 6, 2018, she received 66.63% of the vote to Ballou's 33.37%. She assumed office on January 7, 2019. On September 19, 2024, she was elected by her colleagues as the next chief justice. Her term began on January 6, 2025. == Electoral history ==