Nancy’s interest in politics was sparked while door knocking for her father Ben in 1995. In 2001, she began working as the constituency assistant for Carol Skelton, MP for Saskatoon-Rosetown-Biggar. She later moved to Ottawa to continue to work for Carol Skelton as her legislative assistant on Parliament Hill. Nancy worked for Leader of the Official Opposition (Stephen Harper) as question period coordinator and remained there until 2005.
Following her work on the 2006 federal election, Nancy became a part of the issues management team for the Right Honourable Stephen Harper in the Prime Minister's Office. Nancy subsequently served as director of communications for the Minister of Canadian Heritage before returning home to Saskatchewan.
Nancy was first elected to the legislature in the Martensville constituency in a by-election in March of 2007. She was re-elected in the 2007 provincial election and again in 2011. From 2007 to 2010, she served as Minister of Environment and Minister Responsible for Saskatchewan Water Corporation, Saskatchewan Watershed Authority, and Water Appeal Board.
Nancy has served as Minister of Central Services, Minister Responsible for the Public Service Commission, Minister Responsible for the Lean Initiative, and Vice-Chair of Treasury Board. In June 2014, Nancy was appointed as Minister of Highways and Infrastructure and Minister Responsible for Saskatchewan Gaming Corporation.