Skip to content

  • The Firm
    • Why Cornerstone
    • Firm History
    • Giving Back
  • What We Do
    Capabilities
    • Federal Government Relations
      • State Government Relations
        • Public Affairs & Strategic Communications
          • Political Consulting & Political Action Committees
            • Grant Consulting
              • Association & Coalition Management
                • Business Advisory Services
                  Expertise
                  • Agriculture
                    • Budget & Appropriations
                      • Congressional Oversight & Investigations
                        • Economic Development
                          • Education
                            • Energy & Environment
                              • Financial Services
                                • Health
                                  • International Affairs
                                    • Municipality & Local Government
                                      • National Security
                                        • Defense Health
                                        • Homeland Security
                                        • Defense & Intelligence
                                        • Cyber
                                      • Tax Policy
                                        • Technology & Telecommunications
                                          • Trade
                                            • Transportation & Infrastructure
                                              • Tribal Government
                                              • People
                                                Search by
                                                  • Washington, D.C.
                                                  • Colorado
                                                  • Delaware
                                                  • District of Columbia (local)
                                                  • Georgia
                                                  • Illinois
                                                  • Iowa
                                                  • Kentucky
                                                  • Louisiana
                                                  • Maine
                                                  • Maryland
                                                  • Mississippi
                                                  • Nevada
                                                  • New Hampshire
                                                  • Oklahoma
                                                  • Pennsylvania
                                                  • South Carolina
                                                  • Tennessee
                                                  • Texas
                                                  • Agriculture
                                                  • Budget & Appropriations
                                                  • Congressional Oversight & Investigations
                                                  • Economic Development
                                                  • Education
                                                  • Energy & Environment
                                                  • Financial Services
                                                  • Health
                                                  • Defense Health
                                                  • International Affairs
                                                  • Homeland Security
                                                  • Municipality & Local Government
                                                  • Defense & Intelligence
                                                  • National Security
                                                  • Cyber
                                                  • Tax Policy
                                                  • Technology & Telecommunications
                                                  • Trade
                                                  • Transportation & Infrastructure
                                                  • Tribal Government
                                                  • Federal Government Relations
                                                  • State Government Relations
                                                  • Public Affairs & Strategic Communications
                                                  • Political Consulting & Political Action Committees
                                                  • Grant Consulting
                                                  • Association & Coalition Management
                                                  • Business Advisory Services
                                                • View All
                                              • News & Insights
                                              • Locations
                                                • Headquarters
                                                  • WashingtonDistrict of Columbia
                                                • Mid-Atlantic
                                                  • DoverDelaware
                                                  • WashingtonDistrict of Columbia (local)
                                                  • AnnapolisMaryland
                                                  • PhiladelphiaPennsylvania
                                                • Midwest
                                                  • Chicago & SpringfieldIllinois
                                                  • Des MoinesIowa
                                                  • Oklahoma CityOklahoma
                                                • Mountain West
                                                  • DenverColorado
                                                  • Carson City & Las VegasNevada
                                                • Northeast
                                                  • AugustaMaine
                                                  • ConcordNew Hampshire
                                                • South
                                                  • AtlantaGeorgia
                                                  • FrankfortKentucky
                                                  • Baton RougeLouisiana
                                                  • JacksonMississippi
                                                  • ColumbiaSouth Carolina
                                                  • NashvilleTennessee
                                                  • Austin & Dallas & HoustonTexas
                                              • Contact
                                              Viewing: Oklahoma

                                              A Broad & Diverse Group of Professionals

                                              Meet our team from our Oklahoma office.

                                              • Steven Barker
                                                Principal
                                              • Shelby Forrest
                                                Vice President
                                              • Brian Hackler
                                                Principal
                                              • Maddy Hague
                                                Senior Associate
                                              • Charlie Hannema
                                                Principal
                                              • Lauren McCay
                                                Senior Associate
                                              • Mark Yates
                                                Principal
                                              Want to Join Our Team?
                                              Learn More
                                              800 Maine Avenue, SW
                                              7th Floor
                                              Washington, DC 20024
                                              202.448.9500   |   Email Us
                                              Follow Us
                                              • Home
                                              • Privacy Policy
                                              © Copyright 2026 Cornerstone Government Affairs.
                                              All Rights Reserved.
                                              Cornerstone Government Affairs

                                              Contact