Following graduation from law school, Roger joined the firm of Amundson and Fuller in Lead, South Dakota where he was engaged in private practice.
In 1981, he left private practice to join the Lawrence County States Attorney's Office where he prosecuted felony and misdemeanor cases.
[2] On June 28, 1986, Meade County States Attorney Mike Jackley, who was a law school classmate of Roger's, withdrew before the voting commenced.
His duties as Attorney General included providing legal counsel to the Governor, constitutional officers, and various boards and commissions.
; South Dakota County Commissioners Association; College of American Pathologists; TracFone, Inc.; Deadwood Table Games, LLC; Aflac; and Liv Hospitality.