Allison Dapper

Sidley Austin LLP
Young Professionals
Committee Vice Chair

My Contact Information

Sidley Austin LLP
Washington, DC
Work: 2027368937

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Washington DC


ALLISON DAPPER is a managing associate in the White Collar practice in the Washington, D.C. office. Allison represents clients located in the United States and abroad in investigations by U.S. Department of Justice, the Securities and Exchange Commission, U.S. Food and Drug Administration, the Federal Trade Commission, and other law enforcement authorities. Allison also conducts internal reviews and investigations into allegations of misconduct.

Allison assesses anti-corruption risk associated with mergers and acquisitions transactions, and assists clients with structuring and improving their compliance programs. She also has experience counseling clients on complex eDiscovery issues, including representing clients in Department of Justice and Federal Trade Commission antitrust reviews.

Allison’s pro bono practice includes securing the release of an incarcerated client whose underlying health conditions, and the conditions within the federal prison, made him particularly susceptible to serious illness from COVID-19. She also successfully represented a client in front of the parole commission, and is a member of the Law Firm Antiracism Alliance Criminal Legal System Working Group.

Allison earned her law degree, cum laude, from the Georgetown University Law Center, where she served as an executive editor for the Georgetown Law Journal and was a member of the Appellate Litigation Clinic. Allison received a B.S. in Psychology, magna cum laude, from Xavier University.

Prior to joining Sidley, Allison completed a Pro Bono Fellowship at the American Civil Liberties Union Washington Legislative Office. While at the ACLU, Allison focused on First Amendment and consumer privacy legislation.

Practice Areas

  • Anti-Corruption
  • Compliance Counseling
  • Due Diligence Investigations
  • FDA Enforcement
  • Foreign Corrupt Practices Act
  • Government Investigations
  • Internal Investigations
  • OSHA Defense
  • SEC Enforcement
  • State Attorney Generals
  • White Collar Crime