She was the viceregal representative of Queen Elizabeth II in the province of British Columbia, and was appointed by Governor General David Johnston on the advice of then-Prime Minister Stephen Harper.

Along with her late husband, commercial pilot Lawrence Guichon, she was involved in introducing holistic management to the ranchers of British Columbia.

Prior to her appointment as Lieutenant Governor, Guichon served on the Provincial Task Force on Species at Risk and completed a two-year term as the president of the British Columbia Cattlemen’s Association.

Guichon played a central role in the aftermath of the 2017 provincial election, which resulted in neither the incumbent Liberals or opposition New Democrats winning a majority.

[6] Horgan introduced a no-confidence motion as an amendment to the Speech from the Throne, which passed on June 29, bringing Clark's government down.