Colleen E. Roh Sinzdak

Colleen E. Roh Sinzdak

Washington, D.C.

Email colleen.sinzdak@​

Phone +1 202 637 5823

Fax +1 202 637 5910

Practice groupLitigation, Arbitration, and Employment

As a partner in our Appellate group, Colleen E. Roh Sinzdak has a wealth of experience litigating major questions of constitutional law and statutory interpretation before federal courts at every level.

Colleen has briefed, argued, and won cases before multiple courts of appeals, and she was recently named an American Lawyer Litigator of the Week after successfully convincing a federal district court to issue a temporary restraining order against the President's Executive Order regarding immigration and refugees.

Colleen also maintains a vibrant practice before the United States Supreme Court, where she served as a law clerk to Chief Justice John Roberts from 2011-2012. She has drafted a number of successful certiorari and merits stage briefs before that court, and she served as second chair for Neal Katyal in Town of Chester v. Laroe, a case in which the Hogan Lovells team secured a unanimous victory.

Before law school, Colleen spent several years teaching high school English, where she honed an ability to offer clear explanations of complex subjects to an often skeptical audience.

Awards and recognitions


Dispute Resolution: Appellate, Next Generation
Legal 500 US


Litigator of the week
American Lawyer

Education and admissions


J.D., Harvard Law School, summa cum laude, 2010

M.A., University of Cambridge, Clare College, 2004

B.A., University of Cambridge, Clare College, 2002

B.A., Columbia University, summa cum laude, 2000

Bar admissions and qualifications

District of Columbia

Court admissions

U.S. Supreme Court

U.S. Court of Appeals, District of Columbia Circuit

U.S. Court of Appeals, Second Circuit

U.S. Court of Appeals, Fourth Circuit

U.S. Court of Appeals, Sixth Circuit

U.S. Court of Appeals, Ninth Circuit

Representative experience

Argued and won a TRO blocking implementation of the President's "travel ban"; led the associate team defending the victory before the Supreme Court

Briefed, argued, and won a D.C. Circuit case preserving the dismissal of a petition to enforce a more than US$40m arbitration award

Briefed, argued, and won a case before the Sixth Circuit regarding the Sixth Amendment right to counsel

Argued a major case regarding the scope of tribal sovereign immunity before the Second Circuit

Served as principal drafter for a case in the United States Supreme Court that preserved an important victory regarding tribal jurisdiction

Second chaired a case in the Supreme Court in which the Hogan team obtained an important victory regarding Article III standing and intervention

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