1.202.661.3802
Washington, DC, 
Mr. Valentine represents a wide variety of clients in a broad range of legislative, regulatory, administrative, litigation and government enforcement matters before the federal government. His clients include major corporations, trade associations and business coalitions. He has also represented a number of prominent individuals, including a federal judge in her personal capacity and the prime minister of a foreign government.
W. Dennis Stephens is a government affairs counselor at K&L Gates. He previously served as a senior staff member for several House Republican members, including former Majority Leader Dick Armey. Dennis has more than 37 years working in Republican campaigns, policy, and political matters including more than 21 years experience as a Republican lobbyist.
Dennis works on a wide range of public policy issues including tax, technology, foreign policy, and transportation on behalf of Fortune 500 companies, associations, and small businesses.
Dennis has worked closely with many Republicans in the House and Senate including members of the Republican Study Committee. He has especially close relationships with the House Republican leadership and senior staff as well as many of the incoming freshmen.
In addition, Dennis has worked closely for more than two decades with every leading conservative activist and grassroots organization including The Heritage Foundation, Americans for Tax Reform, FreedomWorks, Americans for Prosperity, and the Family Research Council.
Dennis is very active in the conservative movement and is a regular speaker for the Leadership Institute Capitol Hill Staff School. He is also consulted regularly by Republican elected officials to review both policy issues and electoral strategy and tactics.
Prior to working on Capitol Hill, Dennis spent three years in the second term of the Reagan Administration, including the Office of Presidential Personnel in the White House.
Sean is a government affairs coordinator who focuses on federal policy issues in the Washington, D.C. office of K&L Gates.
He concentrates on federal budget and appropriations issues pertaining to defense, bio-defense, homeland security, energy, nanotechnology, manufacturing, transportation, agriculture, telecommunications, foreign aid, education and health care. In this capacity, he has assisted and advised a variety of clients on the annual budget and appropriations process, as well as matters pertaining to federal stimulus and deficit reduction.
Sean worked for Senator Barbara A. Mikulski for two and a half years prior to joining the firm
2534376815
21218 76th Avenue S., Kent, WA, 98032, 
1717 Pennsylvania Avenue NW, Suite 500, Washington, DC, 20006-4623, 
21218 76th Avenue S., Kent, WA, 98032, 
1717 Pennsylvania Avenue NW, Suite 500, Washington, DC, 20006-4623, 
2025522351
1001 Pennsylvania Avenue NW, Suite 1300 South, Washington, DC, 20004, 
1) Association of Universities for Research in Astronomy, Inc.
4) Board of Regents of the University of Oklahoma
7) Curators of the University of Missouri
11) Esper Regulatory Technologies, Inc.
13) IBX, LLC
14) Jackson and Tull Chartered Engineers
16) Morgan State University Foundation
20) Persivia, Inc.
22) School-Community Health Alliance of Michigan
23) Sheppard Pratt Health System
24) Shimadzu Scientific Instruments Inc.
25) Smiths Group
26) Southeastern Universities Research Association, Inc.
27) Southwest Research Institute
28) SPX Transformer Solutions, Inc.
29) Synoptic Data - F/K/A WeatherFlow Inc.
30) The Johns Hopkins University Applied Physics Laboratory LLC
31) The Research Foundation for the State University of New York
32) University Corporation for Atmospheric Research
33) University of California, San Francisco
35) University of Maryland, Baltimore (UMB)
36) University of Pennsylvania Perelman School of Medicine
5712866482
6929 Conservation Drive, Springfield, VA, 22153, 
2565125708
1901 Sixth Avenue North, 2400 Regions/Harbert Plaza, Birmingham, AL, 35203, 
2565125709
300 BERRY HOLLOW RD, GURLEY, AL, 35748, 
2026613868
1601 K Street, NW, Washington, DC, 20006, 
2) AGC Flat Glass North America, Inc.
3) AIRPORT MINORITY ADVISORY COUNCIL
6) ALTERNATIVE INVESTMENT MANAGEMENT ASSOCIATION LIMITED
7) AMERICAN BUREAU OF SHIPPING
9) American Commercial Space Innovators
10) American Fuel and Petrochemical Manufacturers
11) AMERICAN MARITIME PARTNERSHIP
12) AMERICAN PYROTECHNICS ASSOCIATION
13) American Roll-on Roll-off Carrier Group, Inc.
14) AMERICAN SECURITY ACTION FUND, INC.
15) AMERICAN SMALL MANUFACTURING COALITION
16) American Superconductor Corporation
17) American Tower Corporation
18) AMERICAN WATER
20) Ansys, Inc.
23) Association of Washington Business
24) Astranis Space Technologies Corp.
30) BLUE ORIGIN, LLC
31) BNSF RAILWAY CO.
32) Boeing Employees' Credit Union
33) Boulder Capital Partners OZB, LLC
35) Brightline Holdings LLC f/k/a Virgin Trains USA LLC
37) BUSINESS LEADERS FOR MICHIGAN
38) ByteDance Inc.
39) California Public Employees' Retirement System
41) Capital SouthEast Connector Joint Powers Authority
42) Catalyst Old River Hydroelectric Limited Partnership
43) CERES, INC.
44) Charles River Laboratories International, Inc.
46) CHSPSC, LLC
47) CHURCH ALLIANCE
50) Clark Street Associates LLC on behalf of PSIQuantum
51) Clark Street Associates on behalf of Bright Machines
52) Clark Street Associates on behalf of Lattice Semiconductor
53) Clark Street Associates on behalf of TruckLabs
54) Clark Street Associates on behalf of Western Digital
55) Clark Street on behalf of Qorvo
56) Cleco Power LLC
57) CMS ENERGY CORP.
58) Coalition for Energy Efficient Jobs & Investment
60) COMMERCIAL SPACEFLIGHT FEDERATION
61) Commonwealth Fusion Systems LLC
62) Community Capital Management, LLC d/b/a CRAFund Advisory, Inc.
64) Conservation International Foundation
65) CONSORTIUM OF STATE MARITIME ACADEMIES
66) Consumer Technology Association
67) Cumberland County Hospital System d/b/a Cape Fear Valley Health System
69) Disability Benefits Deadline Initiative
71) Edelman Financial Engines f/k/a Financial Engines
72) ENVIRONMENTAL DEFENSE ACTION FUND
73) ENVIRONMENTAL DEFENSE FUND
74) Equinix, Inc.
75) Financial Accounting Foundation
76) FinCom Ltd.
77) First Trust Portfolios L.P.
79) Fleet Energy America, Inc.
80) Forterra, Inc.
81) G.W. PEOPLES CONTRACTING CO. INC.
82) GLOBAL ALLIANCE FOR CANNABIS COMMERCE
84) Great Elm Capital Group, Inc.
85) GREAT LAKES METRO CHAMBERS
86) Greater Pittsburgh Chamber of Commerce
87) GREATER SPOKANE INCORPORATED
89) Groundfish Forum
90) Gulf of Mexico Reef Fish Shareholders' Alliance
92) Hyundai Motor Company, Ltd.
94) Index Industry Association
95) Industrial Technology Institute
96) Ingo Money, Inc.
97) Inmarsat PLC d/b/a Inmarsat Aviation
98) INSTITUTE OF INTERNATIONAL CONTAINER LESSORS
99) INSTITUTE OF SCRAP RECYCLING INDUSTRIES, INC.
100) Intelligrated Systems, Inc. dba Honeywell Intelligrated
101) INTERNATIONAL HOUSING COALITION
102) James Hardie Building Products, Inc.
103) John Lefas
104) Just Greens LLC
105) LAKE CARRIERS ASSOCIATION
107) Launch on Demand Corporation
108) LEHIGH HANSON INC.
109) LIBERTY MEDIA CORPORATION
110) LOWER PASSAIC RIVER STUDY AREA COOP
111) Lynas USA, LLC
112) Macquarie Infrastructure and Real Assets, Inc.
113) MADE IN SPACE
114) MAGNOLIA LNG LLC
115) MASSACHUSETTS MARITIME ACADEMY, INC.
116) MATSON NAVIGATION
117) Maxar Technologies Holdings Inc. f/k/a SSL MDA Holdings
118) McDermott International, Inc. f/k/a CHICAGO BRIDGE & IRON (CB&I)
119) Michael L. Taylor
120) Midwater Trawlers Cooperative
121) Moda Health
122) MUSEUM OF FLIGHT
123) NANOBUSINESS COMMERCIALIZATION ASSOCIATION
124) Nanotronics Imaging, Inc.
125) National Assn for Biomedical Research
126) NATIONAL ASSOCIATION OF CHAPTER THIRTEEN TRUSTEES (NACTT)
127) NATIONAL ASSOCIATION OF TRAILER MANUFACTURERS
128) NCL CORPORATION LTD.
129) NextStep Interacative Inc.
130) Nortek Security & Control LLC
131) NORTHERN MICHIGAN UNIVERSITY
132) Olympus Power LLC
133) Oshkosh Corporation
135) PacifiCorp Energy
137) PAPER RECYCLING COALITION
138) Parsyl, Inc.
140) Pinnacle Treatment Centers
141) PITNEY BOWES
143) Poplicus Incorporated d/b/a Govini
144) Port of Moses Lake
145) Port of Portland
146) PPG Industries Inc.
147) PRIMET PRECISION MATERIALS, INC.
148) PRN Software
149) Quantum Industry Coalition
150) Qurate Retail, Inc. f/k/a LIBERTY INTERACTIVE CORPORATION
151) QVC, INC.
152) R.T. G. Furniture Corp. d/b/a Rooms to Go
153) Receivables Management Association fka DBA INTERNATIONAL
154) RenaissanceRe Holdings Ltd.
155) Resolve Marine Group, Inc.
156) Savion, LLC
157) Seastreak LLC
158) Sierra Pacific Industries
159) SIXTEEN THIRTY FUND
160) Spire Global, Inc.
162) SPRAGUE ENERGY CORP.
163) ST. LAWRENCE SEAWAY PILOTS ASSN.
165) STEELCASE, INC.
167) Sunshine Silver Mining & Refining Corporation
168) Suntory Business Expert Limited
169) Texas LNG
170) The ESOP Association
171) The First Church of Christ, Scientist
172) The World Dog Alliance Limited
173) TM3 Systems
175) TOWN OF FUQUAY-VARINA, NC
176) Tradebe Treatment and Recycling, LLC
177) Trans AstroNautica Corporation d/b/a TransAstra
178) Trans-Atlantic Business Council
179) TRANSPHORM INC.
181) TRI-CITY DEVELOPMENT COUNCIL
182) TrueBlue, Inc.
183) Turing Inc.
184) U.S. Global Leadership Campaign
185) United Catcher Boats
186) United States Cannabis Council
187) Vanguard Charitable
188) Velocys Inc
189) Veolia Nuclear Solutions f/k/a Kurion
190) Viamedia, Inc.
191) Vitalant
192) VOX Space
193) WATER INNOVATIONS ALLIANCE
194) WATER INNOVATIONS FOUNDATION
195) WESTERN GREAT LAKES PILOTS ASSN
196) WESTON SOLUTIONS
197) XO Energy, LLC
2024086923
1717 Pennsylvania Avenue NW, Suite 500, Washington, DC, 20006-4623, 
1) AAR Corp.
4) Allison Transmission Incorporated
6) Beecher Emission Solution Technologies, LLC d/b/a Ward Diesel
8) Board of Commissioners of Allen County
9) Board of Commissioners of Shelby County, Indiana
10) City of Evansville, Indiana
11) City of Fishers
12) CityBus aka Greater Lafayette Public Transportation Corporation
14) Community Foundation of Northwest Indiana, Inc.
15) DAQRI
17) Dry Prairie Rural Water Authority
18) Duracell Distributing, Inc.
20) Falck USA
21) Global Tel*Link Corporation
22) Goodwill of Central and Southern Indiana, Inc.
23) Hamilton County Board of Commissioners
24) Health & Hospital Corporation of Marion County
27) KSM Consulting
29) Lower Sioux Indian Community in the State of Minnesota
30) Lyft, Inc.
31) Lyten, Inc.
32) Mercantile Capital Corporation
35) Mississippi Band of Choctaw Indians
36) MPI Corporation
37) National Candle Association
38) Perdoceo Education Corporation (f/k/a Career Education Corporation)
39) QHCCS, LLC
42) Specialty Equipment Market Association
44) Superior Air Ground Ambulance Service, Inc.
47) Tile Council of North America
48) Town of Munster
49) U.S. Fashion Industry Association
50) Village of Glenview, Illinois
52) Zotec Partners
21218 76th Avenue S., Kent, WA, 98032, 
5719697050
906 3rd Place, SE, Washington, DC, 20003, 
1601 K Street, NW, Washington, DC, 20006, 
1) Ansys, Inc.
5) FinCom Ltd.
1901 Sixth Avenue North, 2400 Regions/Harbert Plaza, Birmingham, AL, 35203, 
1601 K Street, NW, Washington, DC, 20006,