 Before entering politics, Corwin was on the board of directors of the family business, and worked at a financial firm while earning her master's degree in business administration.In 2019, she was confirmed by the Senate as a Commissioner of the International Joint Commission for United States and Canada.Corwin has said she spent 36 years working in the private sector, beginning her business career at age eight by delivering phone books for The Talking Phone Book, the family business that had been founded by her father, Wilbur Lewis, a former salesman.