JoAnne Buth, Manitoba Senator

JoAnne Buth has been hired as the CEO of Canadian International Grains Institute. (Government of Canada)

Manitoba's JoAnne Buth is stepping down from the Senate, after less than 2½ years in the upper house, to become the new chief executive of the Canadian International Grains Institute.

Buth, the former president of the Canola Council of Canada, was one of five senators Prime Minister Stephen Harper appointed in January 2012.

In a statement, Buth said joining the institute allows her to return to her roots.

"This opportunity represents coming home to me as I come back to work in an industry that is so critical to Canada and to Canada’s reputation internationally," she said in the statement Tuesday.

Fellow Manitoba Senator Don Plett posted a note on Buth's resignation on Twitter: