He represented the electoral district of Pictou Centre in the Nova Scotia House of Assembly from 2006 to 2009, and from 2013 to 2024, as a member of the Progressive Conservatives.

[2] He served as Minister of Health Promotion and Protection in the Executive Council of Nova Scotia.

[6] Dunn represents one of the largest communities of African Nova Scotians outside Halifax.

[7] On September 13, 2023, Dunn announced he would not run in the 2024 Nova Scotia general election,[8] and was shuffled out of cabinet the following day.

He is a graduate of Saint Francis Xavier University with degrees in Arts and Education.