Johnson began her career as a writer in Fox primetime soap opera Melrose Place.

[4] Her other credits include I'll Fly Away, Profiler, Any Day Now, Army Wives, Southland, Rizzoli & Isles, and The Good Wife.

[1] From 2005 to 2006, Johnson was an executive producer on Commander in Chief, which starred Geena Davis as the United States' first female President.

[5] She was later called in to work as showrunner and executive producer on ABC drama Nashville starring Connie Britton and Hayden Panettiere.

[6] For her work on Nashville and The Good Wife, Johnson was nominated for Writers Guild of America Award.