She represented the electoral district of Saint John Lancaster as a member of the Progressive Conservatives.

Prior to becoming involved in politics, she owned and operated Benjamin Moore Colour Centre, a retail decorating store, for 17 years.

[4] Shephard served as Minister of Healthy and Inclusive Communities in the Alward government from 2012 to 2014.

[8] Shephard resigned from cabinet on June 15, 2023, by handing Premier Blaine Higgs a handwritten resignation letter on the floor of legislature after a voting for an opposition motion calling for further studies on Policy 713.

[10] On March 21, 2024 Shephard announced that she would not be a contestant in the provincial election scheduled for October 2024, citing a conflict between the party's traditionally "moderate, centrist values", which she supported, and its recent "hyper-focused trend with far-right politics".