He studied mathematics and computer science at City College Plymouth before relocating to the Seattle metropolitan area.

[4] Harmsworth was elected to the Washington House of Representatives, succeeding Mike Hope, who resigned in summer 2014.

Harmsworth has proposed car tab reductions and accountability to Sound Transit by directly electing the board members.

[10] Harmsworth previously served as a city councilor in Mill Creek, Washington.

[11][12] Harmsworth served as mayor pro-tem from January 2014 until he resigned from the Mill Creek City Council.