Senator, United States Senate, Montana, 2007-2025

Candidate, United States Senate, 2006, 2012, 2018, 2024

Senator, Montana State Senate, 1998-2006

President, Montana State Senate, 2005-2006

Minority Leader, Montana State Senate, 2003-2005

Minority Whip, Montana State Senate, 2001-2003

Former Chair, Veterans' Affairs and The Military

Former Member, Homeland Security and Governmental Affairs, United States Senate

Former Chair, Indian Affairs Committee, United States Senate

Former Member, Permanent Subcommittee on Investigations, United States Senate

Former Member, Subcommittee on Aviation Operations, Safety, and Security, United States Senate

Former Member, Subcommittee on Aviation and Space, United States Senate

Former Member, Subcommittee on Communications, Technology, Innovation and the Internet, United States Senate

Former Member, Subcommittee on Economic Policy, United States Senate

Former Member, Subcommittee on Financial Institutions and Consumer Protection

Former Ranking Member, Subcommittee on Homeland Security, United States Senate

Former Member, Subcommittee on Housing, Transportation, and Community Development , United States Senate

Former Member, Subcommittee on Regulatory Affairs and Federal Management, United States Senate

Former Member, Subcommittee on Securities, Insurance, and Investment, United States Senate

Former Member, Subcommittee on Surface Transportation, Maritime, Freight, and Ports

Former Teacher, Music, F.E. Miley Elementary School

Farmer, Self-Employed

Member, Agricultural Stabilization and Conservation Service Committee, Chouteau County

Member, Big Sandy Soil Conservation Service Committee

Treasurer/Master, Lodge 95 Masons

Chair, Democratic Senatorial Campaign Committee, 2015-2017

Member, Big Sandy School Board, 1983-1992