Chair, Republican Conference, United States Senate, 2019-present

Senator, United States Senate, Wyoming, 2006-present

Majority Policy Committee Chair, United States Senate, 2015-2019

Candidate, United States Senate, Wyoming, 2018

Minority Policy Committee Chair, United States Senate, 2015

Senator, Wyoming State Senate, 2002-2006

Ranking Member, Committee on Energy and Natural Resources

Member, Committee on Finance

Member, Committee on Foreign Relations

Member, Subcommittee on Africa and Global Health Policy

Member, Subcommittee on Energy

Member, Subcommittee on Energy, Natural Resources, and Infrastructure

Member, Subcommittee on Europe and Regional Security Cooperation

Member, Subcommittee on Health Care

Member, Subcommittee on International Trade, Customs, and Global Competitiveness

Ranking Member, Subcommittee on Multilateral International Development, Multilateral Institutions, and International Economic, Energy, and Environmental Policy

Member, Subcommittee on National Parks

Member, Subcommittee on Public Lands, Forests, and Mining

Member, Subcommittee on Water and Power

Former Member, Africa and Global Health Policy Subcommittee, United States Senate

Former Member, Committee on Indian Affairs, United States Senate

Former Member, East Asia, the Pacific, and International Cybersecurity Policy Subcommittee, United States Senate

Former Chair, Environment and Public Works Committee, United States Senate

Former Vice Chair, Minority Conference

Chair, Senate Republican Policy Committee, present

Chair, Senate Western Caucus, present

Former Member, Subcommittee on Clean Air and Nuclear Safety, United States Senate

Former Member, Subcommittee on Fisheries, Water, and Wildlife, United States Senate

Former Member, Subcommittee on National Parks, United States Senate

Former Member, Subcommittee on Public Lands, Forests, and Mining, United States Senate

Former Member, Subcommittee on Transportation and Infrastructure, United States Senate

Former Member, Subcommittee on Water and Power, United States Senate

Former Member, Subcommittee on Western Hemisphere, Transnational Crime, Civilian Security, Democracy, Human Rights, and Global Women's Issues

Former Member, Subcommittee on Western Hemisphere, Transnational Crime, Civilian Security, Democracy, Human Rights, and Global Women's Issues, United States Senate

Ranking Member, the Senate Energy and Natural Resources Committee

Medical Director, Wyoming Health Fairs

Chief of Staff, Wyoming Medical Center

Former Resident, Yale Medical School

Orthopedic Surgeon, Casper Orthopedic Associates, 1983-2007

Member, Board of Directors, A Presidential Classroom for Young Americans

Member, Council on Ethics and Judicial Affairs, American Medical Association

Local Host, Jerry Lewis Labor Day Telethon

Former President, Wyoming Medical Society

Surgeon, Wyoming Rodeo Association

Surgeon, Wyoming State Fair Association

President, National Association of Physician Broadcasters, 1988-1989