Chair, Privacy & Cybersecurity Practice
Fenwick & West LLP
Washington, District of Columbia
Privacy & Cybersecurity Lawyer

Michael Sussmann is the chair of Fenwick's Privacy & Cybersecurity Practice. Michael has been an internationally recognized privacy, cybersecurity, and national security attorney for over twenty-five years. Beginning in 1997 as a cybercrime prosecutor at the U.S. Department of Justice, Michael was one of the earliest leaders in this field.
After eight years of investigating and prosecuting computer intrusions and other internet-related crimes at the DOJ, Michael spent sixteen years building the privacy and data security practice at a large international law firm. In that role, Michael advised industry leaders and their Boards of Directors on a range of sophisticated and high-stakes matters, including unprecedented state-sponsored network intrusions and data breaches, sensitive government investigations, and other bet-the-company representations.
One of Michael's more notable cases was his representation of the Democratic National Committee in its response to Russian hacking in the 2016 presidential election. This high-profile work went on to be detailed in the bestselling books The Apprentice (2018), The Perfect Weapon (2018), Russian Roulette (2018), and Hacks (2017). Investigative reporters wrote about additional notable work Michael has done in two other important books: Power Wars (2015) and Dragnet Nation (2015).
Clients trust Michael with extensive privacy and cybersecurity assessments, advice on data collection and data access by governments, and representations before the DOJ, FTC, state attorneys general and Congressional committees. Michael has litigated prominent national security cases, and he counsels clients on classified government programs and foreign-based investments in or threats to U.S. infrastructure.
Michael has provided Congressional testimony in public and nonpublic hearings and has been frequently quoted in The New York Times, The Washington Post, The Wall Street Journal and other national media. Ranked as a leading privacy and data security lawyer in Chambers Global and Chambers USA, and listed among the Cybersecurity Docket’s Incident Response 40, he is regarded among “the best data breach response lawyers in the business.”
In addition to his eight years in DOJ’s Computer Crime & Intellectual Property Section, Michael’s was Special Assistant to the Assistant Attorney General for DOJ’s Criminal Division, and he prosecuted white-collar and violent crimes at the U.S. Attorney’s Office for the Eastern District of Virginia. Michael was a contributing author to DOJ’s manuals on Prosecuting Computer Crimes, Searching and Seizing Computers and Obtaining Electronic Evidence in Criminal Investigations, and Prosecuting Intellectual Property Crimes.
Michael began his career in New York as an associate in the litigation department of an AmLaw 50 firm.
Fenwick & West LLP
Washington, District of Columbia
Perkins Coie LLP
Washington, District of Columbia
U.S. Department of Justice (DOJ), Computer Crime & Intellectual Property Section
(appointed)District of Columbia
U.S. Attorney’s Office
(appointed)Virginia Eastern
U.S. Department of Justice (DOJ), Criminal Division
(appointed)
Proskauer Rose
Washingtonian Magazine
August 2025
Chambers Global and Chambers USA
August 2025
Cybersecurity Docket
August 2025
Named to the Incident Response 50 list.
The Legal 500
April 2024
(Including data privacy and data protection)
Fenwick Insights
February 2025
The legal landscapes for privacy and cybersecurity continue to evolve rapidly, presenting both challenges and opportunities for innovative companies. Indeed, 2024 was a busy year, with the enactment of a number of new federal and state laws covering protections for personal data, enhanced data breach notifications, AI regulation, and more.
Fenwick Insights
July 2024
On July 18, Judge Paul Engelmayer of the Southern District of New York issued a lengthy order dismissing the majority of the SEC’s enforcement case against SolarWinds Corporation (SolarWinds) and its CISO, Timothy Brown. The ruling is relevant for any company crafting disclosures about its cybersecurity practices, and also includes important analysis for securities fraud cases more broadly, including what constitutes pleading by hindsight and speculation.
Fenwick Insights
July 2023
On July 26, the U.S. Securities and Exchange Commission adopted rules to enhance and standardize public company disclosure of cybersecurity incidents, risk management, strategy and governance. In particular, the rules, which were proposed on March 9, 2022 (see alert), will require current reporting on Form 8-K of material cybersecurity incidents within four days of determining materiality, as well as annual disclosures about a company’s processes to assess, identify and manage material risks from cybersecurity threats; management’s role in assessing and managing material risks from such threats; and the board’s role in providing oversight of such material risks. The key provisions of the rules are summarized in this alert.
Cybersecurity Docket
April 2025
Presented by Cybersecurity Docket, Incident Response Forum Masterclass 2025 is a one-of-a-kind conference focused on incident response and ransomware attacks, specifically catered to legal and compliance professionals who tackle the aftermath of a data security incident. Partner Michael Sussmann will join 30+ industry leaders and senior government officials from the FBI, DOJ, SEC, and CISA to discuss the pressing issues that professionals in the sector face. Join Michael for his panel on “Working with Law Enforcement: Balancing Cooperation with Potential Risks.”
Fenwick
January 2025
CLE compliance deadlines are approaching, and Fenwick’s got you covered. Join us for our annual virtual CLE Speaker Series, where you’ll earn MCLE credit and get a front-row seat to the latest legal updates and insights in dynamic practice areas from Fenwick’s lawyers.
ICON — Palo Alto
September 2024
Preparing for an IPO or acquisition requires readiness from all aspects of a business, including information security. Partner Michael Sussmann will join a panel during the ICON Cyber Day to discuss the key points a CISO should keep in mind during this phase of a company's growth from a legal perspective.
Cybersecurity Docket — Virtual Event
April 2024
Presented by Cybersecurity Docket, Incident Response Forum Masterclass 2024 is a one-of-a-kind, virtual conference solely focused on incident response and ransomware attacks. Sessions are geared specifically toward the legal and compliance professionals who are critical players in the aftermath of a data security incident. Partner Michael Sussman will join 30 other leaders in the incident response field serving on ten panels, including senior government officials from the FBI, DOJ, and SEC, to discuss the most important issues now facing attorneys and professionals who work in this area. Join Michael for his panel on "The Cyber Threat Landscape: Preparation and Remediation."
IAPP — Convention Center Washington, D.C.
April 2024
Fenwick is excited to be moderating a discussion on privacy with FBI Leadership at this year's IAPP Global Privacy Summit. On April 3, partner Michael Sussmann will be joined by Jonathan Lenzner, Chief of Staff to the FBI Director, and Cynthia Kaiser, Deputy Assistant Director of the FBI's Cyber Division, as they discuss how the FBI protects the privacy of Americans while undertaking its mission. The conversation will include the FBI’s use of AI and other emerging technologies, and its reliance on data-driven investigations in countering malicious cyber operations. Learn more about the Think Tank session "A Discussion on Privacy with FBI Leadership" here.