Matthew Leffingwell

🏛️ Revolving Door

Former Government Positions:

Director of Coalition and Member Services, House Appropriations Committee; Chief of Staff, Rep. Kay Granger; Deputy CoS, Rep. Kay Granger; Communications Director, Rep. John Porter; Communications Director, Rep. Mark Kirk

Director of Member Services Coalitions, House Appropriations Cmte.; CoS, Rep. Kay Granger; Deputy CoS, Rep. Kay Granger; Comms. Director, Rep. Kay Granger; Comms. Director, Rep. Jon Porter; Projects Director/Press Secretary, Rep. Mark Kirk

Mbr Servs & Coalitions Dir., House Approps Cmte (2016-2017); CoS, Rep. Kay Granger (2012-2015); Dep CoS, Rep. Granger (2010-2012); Comms Dir, Rep. Granger (2009-2010); Press Sec, Rep. Jon Porter (2007-2009); Projects Dir, Rep. Mark Kirk (2006-2007)

Chief Counsel, House Energy & Commerce Committee (2015-2022); LD & Senior Policy Counsel, Rep. Rush (2012-2015); House Subcommittee on Commerce, Trade, & Consumer Protection (2009-2012)

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AI Overview

Matthew Leffingwell has appeared in 1,338 federal lobbying filings at Tiber Creek Group, representing 50 clients. As a former government official, they bring insider expertise to their lobbying work — part of Washington's "revolving door." Active across 53 policy areas.

1,338
Total Filings
1
Firms
50
Clients
53
Issue Areas

Issue Areas

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Filing History

YearFilingsClients
201816923
201915925
202020935
202120035
202219133
202315526
202411326
202514225

Firms

Tiber Creek Group1338 filings

Top Clients

Jazz Pharmaceuticals87 filings
Airbus Americas, INC.74 filings
Nic INC.66 filings
Deloitte LLP63 filings
One Action63 filings
Friends of the Global Fight Against Aids, Tuberculosis, and Malaria54 filings
Univision Communications INC.53 filings
American Property Casualty Insurance Association49 filings
Eos Energy Enterprises LLC (FKA Eos Energy Storage LLC)43 filings
Environmental Defense Action Fund40 filings
American Hotel & Lodging Association36 filings
Nvg, LLC (on Behalf of Habitat for Humanity International, INC.)32 filings
Tenable, INC.30 filings
Feeding America28 filings
Monkton, INC.28 filings
Stride28 filings
Sunpower Corporation27 filings
Microsoft Corporation26 filings
PHRMA19 filings
Roivant Sciences, INC.19 filings

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Data Sources: Senate LDA Filings

Last updated: February 2026

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