First elected in 2003, Delbert was re-elected in the 2007, 2011, and 2016 provincial elections.
During his term in opposition, Delbert served as the Saskatchewan Party critic for Forestry, deputy critic for Northern Affairs and Industry & Commerce, and as vice-chair of the Standing Committee on the Economy.
Following the formation of a Saskatchewan Party government, Premier Brad Wall asked Delbert to serve as the chair of the legislature's Standing Committee on Intergovernmental Affairs and Justice. Delbert was also appointed as Legislative Secretary to the Premier (Saskatchewan Heritage Initiative) and as a Legislative Secretary to the Minister of Corrections, Public Safety and Policing.
Delbert has served Saskatchewan as Deputy Government House Leader, chair of the Private Members Committee, a member of the House Services Committee, and as a member of the Standing Committee on Crown and Central Agencies.
Delbert currently serves on the caucus Management Committee. He is the Assembly's Deputy Chair of Committees, and a member of the Economy, Private Bills, and Privileges committees.
Delbert and Valerie have three grown children.