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
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.
Colonel Steve McCain retired from the Department of Defense (DOD) after twenty-six years of service and now provides national security policy and appropriations counsel to defense, energy, aerospace, and homeland security industries, academia, and other nonprofit organizations regarding federal business development, budget and acquisition, as well as congressional actions.
Prior to joining the firm, Colonel McCain was the director of legislative affairs, U.S. Pacific Command, and principal advisor to the combatant commander for all congressional liaison. He advocated directly with Congress and professional committee staff for programs, budgets, and policies, and executed legislative strategy which improved global defense force capability. Colonel McCain provided critical support for senior military leadership testimony before Congress regarding the Asia-Pacific region.
In the early stages of Operation Enduring Freedom, he served as commander of an Air Expeditionary Wing where he led support and combat operations of Air Force, Army, Navy, Marine Corps and coalition forces in Afghanistan. He also commanded a combat search and rescue operations group, where he was responsible for flying, training, maintenance, and deployment of personnel and aircraft to combat operations worldwide.
In his capacity as the principal deputy legislative assistant to the Chairman of the Joint Chiefs of Staff, he coordinated legislative efforts with senior military leaders which helped galvanize congressional support for billions of dollars in healthcare reform, operational readiness, and weapon modernization programs. Prior to his tour with the Joint Staff, he was the director of legislative affairs in the Washington, D.C., office of the U.S. Special Operations Command, where he built congressional advocacy for special operations missions and for significant funding increases in key classified programs.
His experience also includes service as a Branch Chief of Aircraft Systems at Warner Robins Air Logistics Center in Georgia, where he managed aircraft and helicopter modification programs. In this capacity, he resolved acquisition, contracting, and logistics challenges with the defense industry.
Colonel McCain has over 2500 hours in various aircraft as a navigator, including 150 in combat. His decorations include the Defense Superior Service Medal, Bronze Star, Legion of Merit, Defense Meritorious Service Medal, Meritorious Service Medal with two oak leaf clusters, Air Medal with one oak leaf cluster, and the Aerial Achievement Medal with four oak leaf clusters.
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.
7202996423
1300 W 120th Ave, Westminster, CO, 80234, 
555 12th Street NW, Suite 700, Washington, DC, 20004, 
555 12th Street NW, Suite 700, Washington, DC, 20004, 
11779 Somerset Avenue, Mezzanine Level, Princess Anne, MD, 21853, 
303-223-1221
675 15th Street, Suite 2900, Suite 2900, Denver, CO, 80202, 
11779 Somerset Avenue, Mezzanine Level, Princess Anne, MD, 21853, 
1300 W 120th Ave, Westminster, CO, 80234, 
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
2023129100
555 12th Street NW, Suite 700, Washington, DC, 20004, 
1) 3M Company
2) ADTRAN
6) AXA Financial/Equitable Life Assurance
7) AXA SA
8) Bausch Health Companies Inc.
11) City of Carlsbad, New Mexico
12) City of Huntsville, Alabama
13) Coalition of Contracted Collection Agencies
16) Electric Power Supply Association (EPSA)
19) FLH Company
20) HawkEye 360
22) Huntsville-Madison County Airport Authority
23) Intuit, Inc.
25) Maxar Technologies Holdings Inc.
27) National Council of Coal Lessors
28) Neuberger Berman Group, LLC
29) Northrop Grumman Corporation
31) Official Committee of Retired Employees of the Commonwealth of Puerto Rico
32) PayPal, Inc.
33) Pharmaceutical Research and Manufacturers of America (PhRMA)
34) PPC USA, Inc.
35) Range Resources Corporation
36) Reinsurance Group of America
37) Solid Waste Disposal Authority of the City of Huntsville
38) South Florida Regional Transportation Authority
39) TECO Energy
12884 Harbor Drive, Suite D, Woodbridge, VA, 22192-2921, 
303-223-1520
675 15th Street, Suite 2900, Denver, CO, 80202, 
1) ACTION BEHAVIOR CENTERS LLC
2) ADVENTHEALTH
3) AFFIRM, INC.
4) AMERICAN RESORT DEVELOPMENT ASSOCIATION
6) BROADCOM
7) BROWNSTEIN HYATT FARBER SCHRECK, LLP
9) COLORADO AUTOMOBILE DEALERS ASSOCIATION
10) COLORADO HEALTH CARE ASSOCIATION
12) CORECIVIC
13) CREEDE CENTER FOR THE ARTS
14) DEALERTRACK REGISTRATION AND TITLING SOLUTIONS
20) GOPUFF
21) HONEYWELL, INC.
22) JACKPOCKET, INC.
24) LIVE NATION
25) LKQ CORPORATION
26) MAXAR
27) NICUSA INC.
30) SUNCOR ENERGY
31) THE SCOTTSMIRACLE-GRO COMPANY
33) WEECYCLE
11779 Somerset Avenue, Mezzanine Level, Princess Anne, MD, 21853, 
2024621717
12884 Harbor Drive, Suite D, Woodbridge, VA, 22192-2921, 
7038225777
11779 Somerset Avenue, Mezzanine Level, Princess Anne, MD, 21853, 
1601 K Street, NW, Washington, DC, 20006, 
11779 Somerset Avenue, Mezzanine Level, Princess Anne, MD, 21853, 
303-223-1447
675 15th Street, Suite 2900, Denver, CO, 80202, 
1) Action Behavior Centers LLC
2) AdventHealth
3) Affirm, Inc.
4) American Resort Development Association
6) Broadcom
7) Brownstein Hyatt Farber Schreck, LLP
9) Colorado Automobile Dealers Association
10) Colorado Health Care Association
11) Colorado Manufactured Housing Coalition
13) Cookware Sustainability Alliance
14) Dealertrack Registration and Titling Solutions
15) Dominion Water & Sanitation District
16) E-470 Public Highway Authority
20) FMR LLC a/k/a Fidelity Investments
21) Jackpocket, Inc.
23) Live Nation
24) LKQ Corporation
25) Maxar
26) NICUSA Inc.
27) PakTech
29) RealPage, Inc.
30) Sterling Ranch Development
32) Suncor Energy
33) The American Society for the Prevention of Cruelty to Animals
34) The ScottsMiracle-Gro Company
35) Weecycle
555 12th Street NW, Suite 700, Washington, DC, 20004,