Sellman is a Republican member of Idaho House of Representatives for District 20, seat B. Sellman's mother was LaVonne Godschalx (née Nelson)(1917-2010), a teacher and a rancher in Idaho.
Sellman's father was William Godschalx (1915-2010), a former Marine and a rancher in Idaho.
[2] Sellman served as a city council member for Mountain Home, Idaho.
[4] On November 7, 2000, as an incumbent, Sellman won the election unopposed and continued serving District 20, seat B.
[5][6] On November 5, 2002, Sellman sought for a seat in Idaho Senate for District 22 unsuccessfully.