[citation needed] Following university Thorsteinson spent three years as Retail Sales Manager for Travelaire Trailer Canada Ltd. in Red Deer, Alberta.
He was one of the founders of Carlson Tours and Incentive Travel Ltd. in 1984 which subsequently changed its name to Cascadia Motivation Inc. Thorsteinson is the Chief Operating Officer of the company.
Thorsteinson entered politics as president of the Red Deer riding association of the Reform Party of Canada in 1988 and served in this position for three years.
In 1988 Thorsteinson served as the campaign manager for Michael Roth, the Reform Party candidate in Red Deer riding.
Later that year in the 2004 provincial election, Thorsteinson placed second in votes in his riding of Innisfail-Sylvan Lake, failing to become a Member of the Legislative Assembly (MLA).
[3] The socially conservative party[4] intended to run a full slate in the 30th Alberta general election in 2019, but ultimately it presented only one candidate.