Areas of Practice
  • Georgetown University Law Center, J.D., summa cum laude, 1994, Associate Editor, Georgetown University Law Journal, Order of the Coif
  • Loyola University, New Orleans, B.B.A., Accounting and Finance, summa cum laude, 1991, Beta Gamma Sigma, Beta Alpha Psi
Judicial Clerkships
  • Hon. David B. Sentelle, US Court of Appeals, District of Columbia Circuit, 1994–95
Bar & Court Admissions
  • District of Columbia
  • US Supreme Court
  • US Court of International Trade
  • US District Court, District of Columbia
  • US Court of Appeals for the First Circuit
  • US Court of Appeals for the Second Circuit
  • US Court of Appeals for the Third Circuit
  • US Court of Appeals for the Fourth Circuit
  • US Court of Appeals for the Fifth Circuit
  • US Court of Appeals for the Sixth Circuit
  • US Court of Appeals for the Seventh Circuit
  • US Court of Appeals for the Ninth Circuit
  • US Court of Appeals for the Eleventh Circuit
  • US Court of Appeals for the District of Columbia Circuit
  • US Court of Appeals for the Federal Circuit

Shannen W. Coffin

1330 Connecticut Avenue, NW
Washington DC 20036
TEL: +1 202 429 6255
FAX: +1 202 429 3902

Shannen W. Coffin is a partner in Steptoe’s Washington office, where his practice focuses on appellate and regulatory litigation.  He frequently represents clients in state and federal trial and appellate courts in matters involving constitutional and administrative law challenges to government regulatory action.  His practice spans a wide range of legal subject matters including First Amendment free speech (e.g., libel and commercial speech), the Administrative Procedure Act, federal preemption, state sovereign immunity, commercial and insurance law, and tribal jurisdiction.  He has represented numerous regulated industries including energy, financial services, retail, insurance, and defense. 

Mr. Coffin’s practice draws on his significant experience as a former senior attorney in the federal government.  He served as Counsel to Vice President Cheney in the Office of the Vice President of the United States.  There, he provided legal advice to the vice president and his staff on constitutional, regulatory, national security and related policy issues, coordinated OVP's response to congressional investigations and litigation, and represented OVP in the inter–agency process with respect to federal regulations and legislation.

Mr. Coffin also served as Deputy Assistant Attorney General in the US Justice Department’s Civil Division, where he was responsible for overseeing and coordinating trial litigation on behalf of the federal government for constitutional challenges to federal statutes, statutory and constitutional challenges to agency programs, and defense of national security and anti-terrorism programs.  He argued numerous significant litigation matters for the federal government in both trial courts and courts of appeals, including constitutional challenges to presidential action, disputes over access to government information and an intervention by the federal government into a major labor dispute. 

Representative Matters

  • Department of Transportation v. Association of American Railroads, 135 S. Ct. 1225 (2015).  Represented educational policy associations as amici curiae in support of railroad association challenging as unconstitutional delegation of legislative rulemaking power to Amtrak.
  • PPL EnergyPlus, LLC v. Solomon, 766 F.3d 241, 255 (3d Cir. 2014) & PPL EnergyPlus, LLC v. Nazarian, 753 F.3d 467, 478 (4th Cir. 2014).  Successfully represented electric energy generator in Federal Power Act preemption challenges to state price subsidy schemes.
  • Town Pump Inc. v. LaPlante, No. 10-35090, 2010 WL 3469578 (9th Cir.).  Successfully challenged jurisdiction of Blackfeet Tribal Court to adjudicate personal injury claims against non-Indian business operating on the Reservation.
  • TCF Bank v. Bernanke, 643 F.3d 1158 (8th Cir. 2011) & NACS v. Board of Governors of the Federal Reserve System, 958 F. Supp. 2d 85 (D.D.C. 2013), rev’d, 746 F.3d 474 (D.C. Cir. 2014).  Represented US merchant community in successfully defending constitutionality of Dodd-Frank Act provisions regulating debit card swipe fees and separately challenging Federal Reserve Board’s implementing regulations.
  • Travelers Indem. Co. v Orange & Rockland Utils. Inc., 1 N.Y.S.3d 56 (App. Div. 2015); 905 N.Y.S.2d 11 (App. Div. 2010).  Represent property and casualty insurer in successfully defending environmental insurance coverage appeals involving insured late notice and pollution exclusion.  
  • United States v. Navajo Nation, 129 S.Ct. 1547 (2009).  Authored amicus curiae brief on behalf of energy company and electric utility company in support of United States’ successful position that it did not breach trust obligations to the Navajo Nation in approving coal leases negotiated by the Tribe with those private parties.
  • State of Arizona v. Western Union Fin’l Servs., Inc., 219 Ariz. 337, 199 P.3d 592 (Az. 2009).  Successfully represented international money transfer service in due process challenge to civil seizure and forfeiture orders directed at out–of–state wire transfers.
  • Esso Standard Oil Co. v. Freytes, 467 F. Supp. 2d 156 (D.P.R. 2006), aff’d, 522 F.3d 136 (1st Cir. 2008).  Successfully enjoined on the basis of improper bias proceedings of Puerto Rico Environmental Quality Board seeking to impose multimillion-dollar environmental fine.
  • Cheney v. US District Court, 124 S. Ct. 1391 (2004).  Defended Federal Advisory Committee Act challenge to the National Energy Policy Development Group, a Presidential advisory group formed to advise and assist the President in the formation of a national energy policy. 
  • Northwestern Memorial Hospital v. Ashcroft, 362 F.3d 923 (7th Cir. 2004).  Argued appeal of discovery dispute addressing the appropriate role of privacy provisions of the federal Health Insurance Portability & Accountability Act (HIPAA) and implementing regulations in litigation in federal court over constitutionality of federal statute.
  • Smith v. Snow, 346 F.3d 264 (2d Cir.  2003).  In attachment proceedings, successfully defended President’s determination to seize and vest previously frozen Iraqi assets for use in rebuilding Iraq.
  • Atkinson Trading Co. v. Shirley, 532 US 495 (2001).  Successfully represented non-Indian hotel and trading post situated on Navajo Indian Reservation in challenge to tribal taxation imposed on hotel guests.
  • United States Fidelity & Guar. Co. v. McKeithen, 226 F.3d 412 (5th Cir. 2000).  Successfully represented workers’ compensation insurers in Takings Clause challenge to funding formula for state workers’ compensation second injury fund.
  • Maska U.S., Inc. v. Kansa General Ins. Co., 198 F.3d 74 (2d Cir. 1999).  Successfully defended property and casualty insurer in environmental insurance coverage dispute.  Court held that insurance policy's pollution exclusion was consistent with public policy and enforceable against insured. 


  • Counsel to the Vice President of the United States, 2005–07
  • Deputy Assistant Attorney General, Federal Programs Branch, Civil Division, United States Department of Justice, 2002–04
  • Am Law Litigation Daily Litigator of the Week (August 1, 2013)
  • Recommended by Legal 500 US for Energy: Litigation 2013

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