• Registration
  • Search
  • About
  • Log in

Matthew Leffingwell

Register This Profile

Matthew Leffingwell

( Federal,  )

Tiber Creek Group

  • mleffingwell@pmj-dc.com

  • 750 9th Street NW, Suite 501, Washington, DC, 20001, 

Clients

1) ABBOTT LABORATORIES

2) AIRBUS AMERICAS, INC.

3) ALTANA TECHNOLOGIES

4) AMERICAN PROPERTY CASUALTY INSURANCE ASSOCIATION

5) BEONE MEDICINES USA, INC. (FKA BEIGENE USA, INC.)

6) CHESAPEAKE CLIMATE ACTION NETWORK

7) COALITION FOR INTERNATIONAL BROADCASTING

8) DELOITTE LLP

9) ENVIRONMENTAL DEFENSE ACTION FUND

10) EOS ENERGY ENTERPRISES LLC (FKA EOS ENERGY STORAGE LLC)

11) FINSECA

12) FRIENDS OF THE GLOBAL FIGHT AGAINST AIDS, TUBERCULOSIS, AND MALARIA

13) GILEAD SCIENCES, INC.

14) GIVEDIRECTLY

15) INTERNATIONAL SOCIETY OF OPTICS AND PHOTONICS

16) JAZZ PHARMACEUTICALS

17) MALARIA NO MORE

18) MICROSOFT CORPORATION

19) MISSISSIPPI COUNTY, ARKANSAS

20) MONKTON, INC.

21) ORGANON, LLC

22) PHLOW CORPORATION

23) SECURE IDENTITY, LLC (DBA CLEAR)

Last Updated: July 24, 2026

LobbyLinxLLC (215)480-0879 info@lobbylinx.com

Copyright © 2026 LobbyLinx. All rights reserved.