Marvin J. Roshell (October 27, 1932 – March 9, 2022) was an American electrician, small business owner, and Democratic politician.

In December 1992, Roshell announced he would resign from the Senate to accept an appointment in the administration of Governor Tommy Thompson.

[4] He was appointed administrator of the Safety and Buildings Division within the Wisconsin Department of Industry, Labor & Human Relations.

[5] Roshell was considered a conservative Democrat while serving in the Senate, and his appointment to a state job in a Republican administration was considered a political ploy to flip the closely divided State Senate from Democratic to Republican control.

[7] While they were both serving in the U.S. Air Force, Roshell met Barbara "Bobbie" Tompkins, of Morrison, Colorado.