[2] Prior to this, she served as deputy ambassador at the Embassy of Canada in Washington, D.C. Hillman grew up in Calgary and Winnipeg.

[5] Hillman worked as a lawyer in private practice in Montreal, and for the Department of Justice in Ottawa.

[5] She was assistant deputy minister of the trade agreements and negotiations branch at Global Affairs Canada, serving as Canada's senior legal adviser to the World Trade Organization and chief negotiator for the Comprehensive and Progressive Agreement for Trans-Pacific Partnership.

[5] In August 2017, Hillman began working at the Canadian embassy in Washington, D.C., serving as deputy ambassador[5] before being appointed acting ambassador when David MacNaughton resigned in August 2019.

[6] Prime Minister Justin Trudeau announced Hillman's appointment as ambassador to the U.S. on March 26, 2020,[6] making her the first woman to hold the post.