David Simon

Practice Areas

David Simon co-leads Global Cyber Incident Response at Mayer Brown. He is a member of the Cybersecurity & Data Privacy, National Security, and Government Contracts practices. A former special counsel at the US Department of Defense and chief cyber counsel to the US Cyberspace Solarium Commission, David has deep experience advising victims of nation-state sponsored cyber attacks, ransomware, and other extortion attacks, and helping to draft more than 30 recently enacted cybersecurity and privacy laws. Dual qualified to practice law in both the European Union (EU) and the United States, 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 US 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, including several implicating notification obligations under the EU General Data Protection Regulation (GDPR) and investigations by European data protection authorities. 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, as well as defense and aerospace companies.