CORNERSTONE AN EMPLOYEE-OWNED COMPANY- PROUD EMPLOYEE-OWNED FIRM SINCE 2016 Cornerstone is a bipartisan, employee-owned consulting firm specializing in federal and state government relations, public affairs and strategic communications, political consulting, grant consulting and business advisory services with locations across the country. Washington, DC Annapolis, MD Atlanta, GA Augusta, ME Austin, TX Baton Rouge, LA Columbia, SC Chicago, IL Denver, CO Des Moines, IA Frankfort, KY Houston, TX Jackson, MS Oklahoma City, OK Concord, NH Springfield, IL 800 MAINE AVENUE, SW, WASHINGTON, DC 20024 202.448.9500 WWW.CGAGROUP.COM | X@CGAGROUP CORNERSTONE AN EMPLOYEE - OWNED COMPANY- PROUD EMPLOYEE - OWNED FIRM SINCE 2016 Cornerstone is a bipartisan , employee - owned consulting firm specializing in federal and state government relations , public affairs and strategic communications , political consulting , grant consulting and business advisory services with locations across the country . Washington , DC Annapolis , MD Atlanta , GA Augusta , ME Austin , TX Baton Rouge , LA Columbia , SC Chicago , IL Denver , CO Des Moines , IA Frankfort , KY Houston , TX Jackson , MS Oklahoma City , OK Concord , NH Springfield , IL 800 MAINE AVENUE , SW , WASHINGTON , DC 20024 202.448.9500 WWW.CGAGROUP.COM | X @ CGAGROUP