Mary Culbertson, Treaty Commissioner of Saskatchewan, is a member of the Keeseekoose First Nation and with her January 2018 appointment she became the first woman Treaty Commissioner of Saskatchewan. She has over 20 years of professional experience working in federal, provincial and territorial governments and with Indigenous organizations. This includes Public Safety & Emergency Preparedness Canada, Corrections Services Canada, the Government of Saskatchewan, the Federation of Sovereign Indigenous Nations, Sunchild Law, and various Tribal Councils. Over the years, Mary has been an active volunteer in many community organizations and engaged in advocacy work with Indigenous communities, families and grassroots organizations.

Mary holds a Juris Doctor of Law from the University of Saskatchewan. She grew up seeing both worlds on her family farm north of Pelly, Saskatchewan, across the river from the Fort Livingston site and her Nation of Keeseekoose. She is the granddaughter of late Senator Roy Musqua and Nellie Brass. She is a mother of four grown children and proud Kokum to 6 grandchildren. She firmly believes the teachings she learned from her family, her aunts, uncles, cousins and parents have shaped her journey, her knowledge and her determination.