Brian Hackler

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Brian Hackler

( Federal,  )

Cornerstone Government Affairs

Clients

1) 3 PROTON LITHIUM INC.

2) AVIATION TRAINING CONSULTING, LLC

3) BERRY AVIATION, INC.

4) COVINGTON AIRCRAFT ENGINES INC.

5) FISTA DEVELOPMENT TRUST AUTHORITY

6) GREATER OKLAHOMA CITY CHAMBER

7) LUGERT-ALTUS IRRIGATION DISTRICT

8) PAYCOM PAYROLL, LLC

9) RTX CORPORATION (FKA RAYTHEON TECHNOLOGIES CORPORATION)

10) THE UNIVERSITY OF ARIZONA

Last Updated: July 24, 2026