Luke Dembosky is a litigation partner based in the firm’s Washington, D.C. office. He is Co-Chair of the firm’s Data Strategy & Security practice and a member of the White Collar & Regulatory Defense Group. His practice focuses on cybersecurity incident preparation and response, internal investigations, civil litigation and regulatory defense, as well as national security issues.

Mr. Dembosky has been featured in Cybersecurity Docket’s “Incident Response 30,” the publication’s annual list featuring the 30 top data breach response lawyers each year since 2018, and was named by the National Law Journal to its 2016 list of “Cyber Security Trailblazers.” Mr. Dembosky is ranked among the leading privacy and data security attorneys in the U.S. by Chambers USA and Chambers Global, where sources say he is “a phenomenal person to work with,” citing “his deep-seated knowledge of cyber and breach response. He recognizes the business implications of a cyber incident, and is very calm and cool under pressure.” Mr. Dembosky is also ranked among a select group of “Leading Lawyers” for Cyber Law, including data privacy and data protection, by The Legal 500 US (2020).

Mr. Dembosky joined Debevoise in March 2016 after serving as Deputy Assistant Attorney General for National Security at the U.S. Department of Justice. In this capacity, he oversaw all national security cyber cases and was the first to manage a new “National Asset Protection” portfolio covering cybersecurity, economic espionage, export control and foreign investment review matters, giving him responsibility over a wide range of technology-related threats. As DAAG, Mr. Dembosky also oversaw the National Security Cyber Specialists network of prosecutors throughout the United States, along with the Foreign Investment Review Staff. He regularly represented DOJ and the Federal Bureau of Investigation in the Committee on Foreign Investment in the United States and in review of international telecommunications licensing matters.

Mr. Dembosky has been involved in leading the DOJ’s response to many of the largest cyber incidents in recent years, serving as the senior DOJ official on the Target, Sony Pictures, Home Depot, Anthem and OPM breaches, among many others. He also received the Attorney General’s Distinguished Service Award for leading the operation to dismantle the GameOver Zeus botnet that caused hundreds of millions of dollars in losses to the U.S. financial sector. Mr. Dembosky has been a regular advisor to the senior leadership of the DOJ, FBI, Secret Service, National Security Council and other agencies regarding major cyber cases and related legal and policy issues. He participated in the negotiation of a 2013 cyber accord with Russia and the historic 5-point agreement signed by President Obama and President Xi Jinping of China in 2015 and has co-represented the DOJ in cyber discussions at the United Nations.

From March 2013 to October 2014, Mr. Dembosky served as Deputy Chief for Litigation in the Computer Crime and Intellectual Property Section of the Department of Justice, where he supervised all cybersecurity and intellectual property crime prosecutions by the 35 attorneys in the section. From fall 2010 to spring 2013, he served as the Department of Justice’s representative at the U.S. Embassy in Moscow. There, he managed the Department of Justice’s transnational crime portfolio at the embassy, represented the United States in high-level diplomatic engagements with Russia and other countries, advised the Ambassador and other senior U.S. officials and worked to build international cooperation on cyber, intellectual property and other matters.

Before joining the DOJ, Mr. Dembosky was a litigation associate with two law firms from 1996 to 2002 and served as a law clerk to the Hon. Richard L. Nygaard of the U.S. Court of Appeals for the Third Circuit from 1994 to 1995.

He is admitted to the bars of Pennsylvania, Delaware and the District of Columbia.

Mr. Dembosky is Co-Chair of the International Bar Association’s (IBA) Cybercrime Subcommittee, is a member of the first IBA Presidential Task Force on Cybersecurity and is Vice Chair of the Cybersecurity, Privacy and Data Protection Committee of the ABA’s Public Contract Law Section. He was recently selected by New York Governor Andrew Cuomo to serve as a member of the Governor’s Cyber Security Advisory Board. He previously served as Co-Chair of the Information Sharing and Analysis Organization Governance Working Group leading the development of internal governance guidance for ISAOs as part of the White House initiative to establish cybersecurity threat sharing platforms across industry.

Mr. Dembosky earned his J.D. cum laude from the University of Pittsburgh School of Law in 1994, where he was elected to the Order of the Coif and the Order of the Barristers and was managing editor of the University of Pittsburgh Law Review. He received his B.A. with High Distinction from Pennsylvania State University in 1990.


  • University of Pittsburgh School of Law, 1994, J.D.
  • Pennsylvania State University, 1990, B.A.

Bar Admissions

  • Pennsylvania
  • Delaware
  • District of Columbia