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David Simon is a partner in Mayer Brown's Washington DC office and a leading member of the global Cybersecurity & Data Privacy practice. He is also a member of the firm's National Security and Government Contracts practices. A former special counsel at the US Department of Defense (DoD) and chief cyber counsel to the US Cyberspace Solarium Commission, David has deep experience advising victims of ransomware attacks and state-sponsored cyber activity. Named as a Cybersecurity Trailblazer by The National Law Journal, David has also been named to Cybersecurity Docket’s “Incident Response 40,” a collection of 40 of the “best and brightest” incident response attorneys in the country. David regularly supports clients as the lead investigator and crisis manager for cross-border cyber incidents, including data breaches involving personal data, nation-state threats targeting intellectual property, state-sponsored theft of sensitive U.S. government information, and destructive attacks. David has directed and advised on dozens of complex cyber incident and data breach investigations in the last few years alone. He has counseled companies on major cyber incidents and incident preparedness across virtually every sector of the economy. David represents financial institutions, automotive manufacturers and self-driving car companies, tech companies, telecommunications companies, healthcare companies, insurance companies, defense and aerospace companies, private equity firms and their portfolio companies.

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On July 28, 2021, President Biden signed a national security memorandum that seeks to “significantly improve” the cybersecurity of critical infrastructure systems. The “National Security Memorandum on Improving Cybersecurity for Critical Infrastructure Control Systems” (the “Memorandum”) reflects the administration’s conclusion that “[t]he cybersecurity threats posed to the systems that control and operate the critical infrastructure