Brian Hackler is named as a lobbyist on federal disclosure filings for 14 clients through Cornerstone Government Affairs, Inc.. The most recent filing naming them posted in October 2026. Issues reported include Defense, Budget/Appropriations, Transportation and Aerospace.
Filers must list covered executive or legislative branch positions held. As filed:
| Client | Registrant | Latest | Issues |
|---|---|---|---|
| RTX CORPORATION (FKA RAYTHEON TECHNOLOGIES CORPORATION) | CORNERSTONE GOVERNMENT AFFAIRS, INC. | Q3 2026 | Aerospace, Trade (domestic/foreign), Defense |
| PAYCOM PAYROLL, LLC | CORNERSTONE GOVERNMENT AFFAIRS, INC. | Q3 2026 | Financial Institutions/Investments/Securities, Labor Issues/Antitrust/Workplace, Taxation/Internal Revenue Code |
| GREATER OKLAHOMA CITY CHAMBER | CORNERSTONE GOVERNMENT AFFAIRS, INC. | Q3 2026 | Aerospace, Transportation, Defense |
| BERRY AVIATION, INC. | CORNERSTONE GOVERNMENT AFFAIRS, INC. | Q3 2026 | Defense, Budget/Appropriations |
| LUGERT-ALTUS IRRIGATION DISTRICT | CORNERSTONE GOVERNMENT AFFAIRS, INC. | Q3 2026 | Economics/Economic Development, Agriculture, Budget/Appropriations |
| FISTA DEVELOPMENT TRUST AUTHORITY | CORNERSTONE GOVERNMENT AFFAIRS, INC. | Q3 2026 | Defense, Urban Development/Municipalities, Government Issues |
| 3 PROTON LITHIUM INC. | CORNERSTONE GOVERNMENT AFFAIRS, INC. | Q3 2026 | Natural Resources, Defense |
| THE UNIVERSITY OF ARIZONA | CORNERSTONE GOVERNMENT AFFAIRS, INC. | Q3 2026 | Budget/Appropriations, Natural Resources, Defense |
| COVINGTON AIRCRAFT ENGINES INC. | CORNERSTONE GOVERNMENT AFFAIRS, INC. | Q3 2026 | Defense, Trade (domestic/foreign), Tariff (miscellaneous tariff bills) |
| AVIATION TRAINING CONSULTING, LLC | CORNERSTONE GOVERNMENT AFFAIRS, INC. | Q3 2026 | Defense |
| U.S. ALUMINUM COMPANY, LLC | CORNERSTONE GOVERNMENT AFFAIRS, INC. | Q3 2026 | Defense, Trade (domestic/foreign), Manufacturing |
| BANCFIRST | CORNERSTONE GOVERNMENT AFFAIRS, INC. | Q4 2025 | Banking |
| OU MEDICINE, INC. | CORNERSTONE GOVERNMENT AFFAIRS, INC. | Q4 2025 | Transportation, Defense |
| ECHO INVESTMENT CAPITAL LLC | CORNERSTONE GOVERNMENT AFFAIRS, INC. | Q1 2025 | Economics/Economic Development |
| Year | Clients | Registrants |
|---|---|---|
| 2026 | 10 | 1 |
| 2025 | 11 | 1 |
| Year | Items | Total |
|---|---|---|
| 2026 | 6 | $9K |
Pay is not disclosed for individual lobbyists. Filings do not confirm that records with the same name are one person, so this page may combine people who share the name Brian Hackler. See the Capitol Clarity rankings and method.