Kalk also served as Speaker of the Band Assembly, the legislative body that enacts laws that regulate the Band's affairs and appropriates money for tribal government programs.
Before being elected Secretary/Treasurer, Kalk served as Commissioner of Natural Resources for nine years.
He has also worked for the Band's Department of Natural Resources as a deputy registrar.
As the Commissioner of Natural Resources, Curt sat on the board of directors for the Great Lakes Indian Fish & Wildlife Commission; due to his natural resources background, as the Secretary/Treasurer, he also served as member of the United States Environmental Protection Agency's National Tribal Operations Committee in 2009–2011.
After his high school graduation, Kalk served in the U.S. Marine Corps for four years.