
Home / Professionals / Nicholas J. Lewin
Nick Lewin, a co-founder of KKL, represents entities, executives and individuals who are facing complex investigations by federal prosecutors, Congress and U.S. regulatory agencies. His work often involves national security, multinational and cross-border investigations. An accomplished trial and appellate lawyer, he has substantial experience representing companies and individuals in complex civil litigation in federal court.
Nick draws on his experience as a former Deputy Chief of the Criminal Division of the U.S. Attorney’s Office for the Southern District of New York, as a former senior FBI official, and more than a decade as a federal prosecutor. As a prosecutor, he investigated and prosecuted some of the most important national security cases since 9/11 – including as a lead trial prosecutor of United States v. Osama bin Laden, et. al – and led the government’s investigations into a variety of highly sensitive national security and cybersecurity matters. Nick served as Special Counsel to two FBI Directors, advising on a wide array of operational and policy issues, congressional relations, and as liaison to the White House National Security Council. He has conducted a dozen jury trials and has argued multiple appeals.
Since returning to private practice, Nick has counseled and represented corporate and individual clients in matters involving allegations of securities and financial fraud, sanctions violations, money laundering, economic espionage, foreign interference in U.S. elections, and violations of the Foreign Corrupt Practices Act (FCPA), the Foreign Agents Registration Act (FARA), and the False Claims Act (FCA). Nick has earned some extraordinary outcomes for his clients in both civil and enforcement matters, including a post-conviction dismissal in a wire fraud case, the dismissal of insider trading charges in a widely reported securities case, the dismissal of FCPA charges in a high profile case against a technology company executive, and a substantial monetary award in an arbitration on behalf of the former president of a multibillion-dollar company.
He regularly represents prominent lawyers and global law firms, including on issues relating to national security, serves as counsel to executives of technology start-ups, and represents individual board members in civil litigation. Nick works hands-on with his clients, seeking to understand the legal issues quickly and build a strategy to resolve the problem holistically, in the context of the broader business, political or personal situation. Nick has devoted significant time to representing a group of families, pro bono, in their support of plea agreements reached between 9/11 defendants and military prosecutors.
Show More“A spectacular lawyer who you want in your corner for a fight.”
Chambers USA
“Nick is amazing. He has enormous credibility which shows in the results he gets.”
Chambers USA
“He is a guru.”
Chambers USA
“Nick is unflappable, tenacious as an advocate, and consistently achieves brilliant results for his clients.”
Chambers USA
Representative Matters
- Part of a team that achieved a post-conviction dismissal with prejudice of all charges against Mark Hazelwood, the former President of the nation’s largest diesel fuel retailer, Pilot Flying J.
- Secured the dismissal of insider-trading charges and the resolution of other charges with no prison time in a widely reported securities case in the Southern District of New York.
- Part of a team that secured dismissal of all FCPA counts against Gordon Coburn, the former President of Cognizant Technologies.
- Secured the dismissal of all charges on behalf of his client, a senior employee of a multinational financial institution, in a high-profile securities fraud case in Boston.
- Conducted an internal investigation on behalf of global public company relating to potential CFIUS violations.
- Served as pool counsel for multiple public companies – including in the pharmaceutical, defense and financial services industries – in relation to potential violations of the False Claims Act (FCA).
- Represented a major philanthropy organization in high profile disputes relating to leading artificial intelligence (AI) company.
- Represent a former CIA officer in federal criminal case involving allegations of foreign agency.
- Represented Halkbank, a Turkish state-owned bank, in a high-profile charged case relating to alleged violations of U.S. sanctions.
- Represent Columbia Law School Professor Daniel Richman in connection with a civil lawsuit regarding the government’s repeated violation of his rights under the Fourth Amendment to the U.S. Constitution.
Publications and Speaking Engagements
- Lawfare: “Justice in the 9/11 Case Is Long Overdue,” co-authored with Michel Paradis (Lawfare, Sept. 11, 2026)
- “U.S. Terrorism Law Hits Close to Home: The Designation of Drug Cartels as Foreign Terrorist Organizations Is Not a Foreign Issue” (New York Law Journal, Feb. 21, 2025)
- Speaker, 6th National Forum on FARA, Washington, D.C. (ACI, Dec 6, 2024)
- Speaker, 4th National Forum on FARA, Washington, D.C. (ACI, Dec. 5, 2022)
- “FARA: Issues and Recommendations for Reform” (American Bar Association FARA Task Force, Sept. 29, 2021)
- Washington Post Op-Ed: “20 Years After the Attacks, the Accused of 9/11 Must Finally be Tried – In Civilian Courts” (Washington Post, September 9, 2021)
- “New Guidance Illustrates That Ordinary Activities May Have FARA Implications” (New York Law Journal, Jan. 11, 2021)
- Speaker, 3rd National Forum on FARA, Washington, D.C. (ACI, Dec. 9, 2021)
- Speaker, 2nd National Forum on FARA, Washington, D.C. (ACI, Dec. 4, 2020)
- “How to Stay Out of the DOJ’s Crosshairs” (PR Week, Nov. 19, 2020)
- “National Forum on FARA” Washington, D.C., (ACI, Sept. 25, 2019)
- “Three Common Misperceptions About FARA”; (PRWeek, Apr. 3, 2019)
- “Debunking FARA Myths (and Why Lawyers Should Be Paying Attention)” (New York Law Journal, Jan. 21, 2019)
- “Cross Border Anti-Corruption Regulation and Enforcement” (Panel Hosted by Pinheiro Guimarães, São Paulo, Brazil, Dec. 7, 2018)
- “Justice in Our Time: Faster and Fairer Solutions to the Military Commissions at Guantánamo Bay” (New York City Bar Association, May 8, 2018)
Related Capabilities
Credentials
Education
J.D., Yale Law School
M.P.A., University of North Carolina at Chapel Hill
B.A., Binghamton University (SUNY)
ClerkshipsHon. Dennis Jacobs, Chief Judge, U.S. Court of Appeals for the Second Circuit
Hon. Charles S. Haight, Jr., U.S. District Judge, SDNY
Government Service
Assistant United States Attorney, U.S. Attorney’s Office, SDNY
- Deputy Chief, Criminal Division
Special Counsel to FBI Directors Robert S. Mueller III and James B. Comey
Guantánamo Detainee Review Task Force
Associate Director, White House Council on Youth Violence, Domestic Policy Council
Presidential Management Fellow, U.S. Department of Justice
Special Assistant to the Director, Office of Community Oriented Policing Services (COPS), U.S. Department of Justice
Admissions
New York
U.S. District Court, SDNY
U.S. District Court, EDNY
U.S. Court of Appeals, Second Circuit
U.S. Court of Appeals for the D.C. Circuit
U.S. Supreme Court
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