From 1998 to 2002, Lockwood served the Michigan 51st District as Representatives, as a Democrat.
On March 18, 2004, she was appointed by Governor Jennifer Granholm to the position of Emerald Ash Borer (EAB) Policy Director.
She defeated Joseph Graves in 2008 to retain her seat on the County Board of Commissioners.
[7] Granholm appointed her acting Michigan Racing Commissioner until the office was abolished on October 17, 2010.
[8] Lockwood decided not to run for re-election for the County Commissioner, 6th District in 2010.