Dr. Mark Popofsky

Instructor

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Biography

Mark Popofsky is a Lecturer in Law at Harvard Law School, where he teaches antitrust courses. He has over 25 years of experience in the legal field, having served as an Adjunct Professor of Advanced Antitrust Law and Economics at Georgetown University Law Center, and as a Lecturer in Law at the University of Pennsylvania Carey Law School. Popofsky has held significant positions including Senior Counsel at the Antitrust Division of the U.S. Department of Justice, where he participated in key trials such as United States v. Microsoft Corp. and United States v. Nippon Paper. He currently serves as trial counsel for Google in a notable case concerning search monopolization. His scholarly work focuses on exclusionary conduct and the intersection of antitrust and intellectual property, with widely cited publications in the field. He is an active member of the ABA Antitrust Section and has clerked for Judge Dorothy W. Nelson on the U.S. Court of Appeals for the Ninth Circuit. He holds a J.D. from Harvard Law School and an A.B. in History and Economics from Brown University.

Research Interests

Experience

Lecturer in Law

2025-01-01 — 2026-01-01

Harvard Law School • Cambridge, MA

Teaching antitrust courses.

Chair, Antitrust Group

— Present

Ropes & Gray LLP •

Leading the antitrust practice.

Adjunct Professor of Advanced Antitrust Law and Economics

— Present

Georgetown University Law Center •

Teaching antitrust law.

Lecturer in Law

— Present

University of Pennsylvania Carey Law School •

Teaching advanced antitrust.

Senior Counsel

— Present

U.S. Department of Justice, Antitrust Division •

Involved in major antitrust cases.

Trial Counsel

2020-01-01 — Present

Google •

Current role in Google search monopolization case.

Prosecutor

— Present

U.S. Attorney’s Office, Eastern District of Virginia •

Worked as a prosecutor.

Courses

Antitrust Intellectual Property Antitrust Law

Requirements for Harvard Law School

Master Program
Requirements
TOEFL
Listening
Required:25
Reading
Required:25
Writing
Required:25
Speaking
Required:25
Total
Required:100
Prerequisites
J.D. from an ABA-approved U.S. law school or a first law degree (LL.B. or equivalent) from a foreign law school
Application Checklist
  • Online application form
  • CV/Résumé
  • Personal statements (Parts A and B)
  • At least two recommendations
  • Official transcripts and diplomas
  • Official TOEFL report (if applicable)
  • Application fee ($85)
Specialization Notes

Applied for under 'Department of Law', 'Department of Human Rights and Humanitarian Law', 'Department of Constitutional Law', 'Department of Japanese Legal Studies', and 'Department of Human Rights'.