Johnson worked as prosecutor in
Cook County and
Lake County before taking a position at
Allstate as a corporate attorney. In 2018, while serving as a member of the Board of Trustees, she advocated for a pay increase for elected officials to help increase the number of qualified candidates for office. As of 2020, Johnson was also serving as Chair of the
Advocate Condell Medical Center Governing Board. She was sworn in on May 4, 2021. She is the first
Black mayor in the city's 185-year history. Libertyville has a Black population of 1.3%, according to the
United States Census Bureau, and she is the second woman and first person of color to serve as mayor. After taking office, Johnson announced her priorities as including a balanced budget, the development of the downtown business district, and the promotion of small businesses. During her tenure, a local cannabis sales tax was enacted for Libertyville, and $170,000 was awarded to local businesses through the Libertyville High Five Grant program. In March 2022, she announced the sale of the Libertyville indoor sports complex to the Canadian firm Canlan Sports for $3.13 million; the village had been trying to sell the complex for years due to high debt payments. ==Personal life==