He previously served as the Member of Parliament in the House of Commons of Canada for the riding of Cape Breton—Canso and its predecessor, Bras d'Or—Cape Breton, from 2000 to 2019.
[5] As an elected official representing Nova Scotia and Cape Breton Island, he worked with community and industry to build and mature the tourism sector.
Cuzner traditionally delivered a humorous, politically themed rewrite of "Twas the Night Before Christmas" on the last house sitting before the holiday break.
[11][12] On October 31, 2020, it was reported that Prime Minister Justin Trudeau appointed Cuzner as the new Consul General to the United States (Boston).
[13][14] On October 31, 2023, he was summoned to the Senate of Canada by Governor General Mary Simon, on the advice of Prime Minister Justin Trudeau.