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In recent years, the dramatic rise of cyberattacks, ransomware attacks, data breaches, privacy incidents, and technology threats worldwide have created the critical need for companies to preemptively plan for cybersecurity- and privacy-related risks. Whether hostile nation state threat actors or financially motivated cybercriminals, the threats are real ― and they are here. Sidley’s Privacy and Cybersecurity practice group can help ― proactively and if necessary, crisis response.

The often-changing regulatory landscape ― federal, state, and international ― also makes for complicated compliance structures. Sidley’s Privacy and Cybersecurity practice provides exceptional counsel and representation to avoid the many cyber and privacy pitfalls that await and to allow clients to focus on providing high-quality products and services. Cutting-edge technologies like artificial Intelligence (AI) and quantum computing present complex problems for clients. Sidley is experienced and well-positioned to help clients with their evolution and implementation. The practice group also has worked on myriad transactions involving complicated terms and thorny data-related questions, as well as CFIUS-related issues implicating national security concerns. Our lawyers have held high-ranking positions with the federal government, including the White House, U.S. Department of Justice, U.S. Securities and Exchange Commission, the Federal Trade Commission (FTC), and other federal departments and agencies, as well as with United States congressional offices.

Sidley’s Privacy and Cybersecurity practice established itself nearly three decades ago as a leading source for privacy and cybersecurity counsel, assisting clients with a wide array of complex confidential information security, artificial intelligence (AI), incident and data breach response, privacy and data protection, investigations, and transactional matters. Since 1998, the group has been at the forefront of cyberlaw, particularly with regard to critical infrastructure sectors:

  • Agriculture and Food
  • Chemical and Hazardous Materials Industry
  • Defense Industrial Base
  • Government Facilities
  • Nuclear Reactors, Materials, and Waste
  • Communications
  • Financial Services
  • Critical Manufacturing 
 
  • Emergency Services
  • Information Technology
  • Transportation
  • Commercial Facilities
  • Dams
  • Energy
  • Healthcare and Public Health
  • Water and Water Treatment Systems 
“Sidley provides absolute excellence in technical expertise, mastery of legal and regulatory issues, strong relationships with US and foreign government officials.”
Chambers USA 2025: Nationwide – Privacy & Data Security: The Elite

From Fortune 100 corporations to emerging startups, our lawyers rapidly guide companies in all critical infrastructure sectors through data security crises of all sizes to safeguard them from evolving global threats and securing data assets. Consisting of more than 70 lawyers, our global team has significant experience in addressing cutting-edge vulnerability and cybersecurity risks, both from a proactive counseling and compliance assessment perspective, as well as reactive incident response, internal reviews, crisis management, government investigations, shepherding complex business transactions, national security matters, litigation, and administrative law.

Sidley’s Privacy and Cybersecurity practice team includes a global assembly of seasoned cyber lawyers who have also worked at high levels of the federal government, intelligence community, and U.S. military. Sidley’s privacy and cybersecurity lawyers work shoulder-to-shoulder with clients to navigate evolving cyber-oriented law and policy, including America’s AI Action Plan, the National Cybersecurity Strategy, the U.S. Department of Justice Bulk Data Compliance Rule, the European Union General Data Protection Regulation (GDPR), and the European Union’s AI Act.

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A Record of Success

As a top-tier global law firm with a multidisciplinary Privacy and Cybersecurity team, for nearly 160 years, Sidley has diligently represented a broad range of businesses in a variety of sectors, advocating for companies in many of the precedent-setting cases and regulatory initiatives. Our lawyers have deep experience in the rapidly developing areas of information security, cyber, and technology, advising clients on challenging issues related to AI, data privacy, governance, analytics and ethics, the Internet of Things, adtech, and other innovative business applications. The firm also works with C-suite executives and corporate boards to address their public disclosure obligations and fiduciary responsibilities to shareholders and other stakeholders. The Privacy and Cybersecurity team has a strong knowledge base to address issues around the globe and ensure our clients are best positioned to handle a cyber incident no matter the type of data at issue, the type of threat or threat actor, or region of the world that may be implicated.

Few other firms can match the depth and breadth of Sidley’s global cyberlaw platform. Our award-winning lawyers have consistently earned acknowledgement from numerous industry publications, including Chambers, The Legal 500, Global Data Review, Global Investigations Review, and Who’s Who Legal, among others.

Ranked Among the Elite in Privacy & Data Security
Chambers USA Nationwide 2025 and Chambers Global 2025
Ranked in Crisis & Risk Management
Chambers Global 2025
Ranked in Data Protection & Information Law
Chambers UK 2025
Ranked in Data Protection, Privacy and Cybersecurity
The Legal 500 UK 2025
Ranked in Cyber Law
The Legal 500 USA 2025t
Recognized in Global Data Review’s GDR 100
Global Data Review 2024
Recognized in Global Investigations Review’s GIR 100
Global Investigation Review 2024

Sidley’s Privacy and Cybersecurity practice group brings value to clients in the following ways:

  • Integrated Services: The team leverages the firm’s vast range of legal disciplines and resources to create one tactical, cost-effective strategy for our clients, which can be difficult for more narrowly focused firms to support. Sidley provides a multidisciplinary team that includes the firm’s Banking and Financial Services, Securities Enforcement, Life Sciences, Litigation, International Trade, Technology and Life Sciences Transactions, Telecom and Internet Competition, and Government Strategies practices to provide seamless advice on complex privacy and cybersecurity matters.
  • Cyber Investigations and Litigation: The Privacy and Cybersecurity practice group represents companies in class actions, derivative actions, and group litigation arising out of data breach incidents, as well as conducts internal investigations on behalf of boards of directors with respect to corporate incidents, material cyber incursions, and preparedness. Sidley lawyers regularly respond to enforcement actions brought against clients by the Federal Trade Commission (FTC), state attorneys general, the Securities and Exchange Commission (SEC), Federal Communications Commission (FCC), and other federal government and state regulatory agencies, as well as EU data protection authorities. In that regard, the firm’s privacy and cybersecurity lawyers have extensive experience assisting with responses to EU, U.S., and international law enforcement agencies and EU data protection authorities.
  • Novel Artificial Intelligence (AI) and Generative AI Counsel: Sidley is a leading adviser to companies that both develop and use AI and data analytics applications, as well as companies that are impacted by the proliferation of AI applications across various industries. We advise our clients on the host of novel legal and regulatory concerns involving many different areas of law, including privacy, cybersecurity, commercial and intellectual property (IP) transactions, IP ownership and rights, products liability, labor and employment, insurance, consumer protection, corporate governance, national security, ethics, government policy, and regulation.
  • U.S. and International Regulatory Insight: Members of the Privacy and Cybersecurity team were on the ground floor in the development of cyberlaw regulation and enforcement, having served in senior government roles combined with others who regularly engaged with cyber policymakers. Sidley’s representation has included interaction and advocacy with key federal, state, tribal, territorial, and international agencies, including:
  • Department of Homeland Security (DHS)
  • Department of Justice (DOJ)
  • National Security Agency (NSA)
  • Federal Bureau of Investigation (FBI)
  • Central Intelligence Agency (CIA)
  • United States Secret Service
  • Cybersecurity and Infrastructure Security Agency (CISA)
  • FTC
  • SEC
  • FCC
  • State attorneys general 
 
  • New York Department of Financial Services
  • California Privacy Protection Agency (CPPA)
  • Insurance commissions, UK Information Commissioner’s Office (ICO)
  • Cybersecurity Service for the Union Institutions, Bodies, Offices and Agencies (CERT-EU)
  • European Data Protection Supervisor (EDPS)
  • Irish Data Protection Commission (DPC)
  • European Data Protection Board (EDPB)
  • UK Financial Conduct Authority (FCA)
  • UK National Cyber Security Centre (NCSC)
  • Department for Digital, Culture, Media and Sport of the United Kingdom (DCMS) 
  • Quantum Computing and Blockchain Technologies: Sidley lawyers are already working with clients to help prepare for the rapidly approaching arrival of the post-quantum computing future. Our lawyers are forward looking. Having embraced the advent of this game-changing technology and its impact on traditional encryption, as well as blockchain incorporated into the cryptocurrency, supply chain management, cybersecurity, and healthcare industries, for example, our team is strategically centered at the intersection of law and cutting-edge technology.
  • Tenacious Lawyers With a Moral Compass Coupled With Creative Solutions: Sidley’s privacy and cybersecurity lawyers have conducted [hundreds/thousands] of investigations for institutions across the globe and regularly engage with federal and state agencies, commissions, and law enforcement on clients’ myriad issues involving investigations and guidance by the FTC, the expanding cybersecurity agenda of the SEC, state attorneys general inquiries and prosecutions, and evolving privacy- and cybersecurity-related legislative initiatives at both federal and state levels. Our lawyers have in-depth knowledge of U.S., EU, UK, and Asia Pacific laws and regulations and have developed strong relationships with government regulators, law enforcement, and their respective staff.
  • Industry Advocate: Our team has had a longstanding tenure in cyberlaw, engaging at high levels with industry, government, civil society, and academia. This depth and experience allow us to collectively “peer around corners” and preemptively assist clients in understanding the cyber and privacy issues that will continue to emerge. In addition to frequent speaking engagements at the national and international levels, our Privacy and Cybersecurity practice group regularly issues bulletins and alerts, and hosts seminars and webinars addressing emerging issues. Our industry-leading blog, “Data Matters” is available here. Sidley also organizes and hosts many industry privacy and cyber networks and benchmarking roundtables.

Innovative Solutions for Clients

Our Cyberlaw team has helped clients navigate a wide array of complex challenges; the trend is toward more complexity, not less.

INCIDENT PREPAREDNESS AND RESPONSE PLANS

  • Assist multinational companies to develop incident response plans. Provide comprehensive cybersecurity overviews to identify potential risks and develop custom incident response plans accordingly.
  • Prepare draft playbooks and other draft documents such as policies, standard operating procedures, individual notifications, and regulator notices, as well as legal assessments and reviews.
  • Prepare (in person and virtually) board directors on fiduciary duties related to their organization’s privacy and cybersecurity best practices.
  • Develop and conduct unique tabletop exercises (TTX) to help clients prepare for, and increase resiliency against, data breaches and pressure test incident response plans.

DATA GOVERNANCE

  • Conduct internal cybersecurity and digital governance legal assessments and due diligence on behalf of boards and senior executives.
  • Design and implement data governance systems (such as “ethical stewardship” of data) for operational and innovative data use, including risk mitigation for AI deployments.
  • Design data governance architecture that classifies information by sensitivity and significance.
  • Deliver operational and board-level training on cybersecurity matters.

TABLETOP EXERCISES (TTX) AND TRAINING

  • Develop custom tabletop scenarios based on client’s business needs.
  • Conduct on-site incident scenario exercise, working with stakeholders to assess decision points.
  • Debrief client on TTX outcomes and provide observation, gaps, and recommendations.
  • Team with forensic firms to provide an added layer of complexity by engaging the IT department.

CRISIS MANAGEMENT AND DATA BREACH INCIDENT RESPONSE

  • Respond to complex multijurisdictional data breaches worldwide, including advanced persistent threats (APTs) and threat actors.
  • Assess legal obligations under United States (federal and state), European Union (EU), United Kingdom (UK), and other international regulations and contractual commitments.
  • Engage and manage forensic service providers and other service providers.
  • Liaise with regulators and law enforcement agencies in the United States (federal and state), EU, and other international authorities.

CYBERSECURITY INVESTIGATIONS AND LITIGATION

  • Represent organizations in class or group litigation arising out of data breach incidents.
  • Respond to enforcement actions brought by federal and state regulators and law enforcement in the United States (federal and state) as well as by EU and UK data protection authorities.
  • Conduct internal investigations on behalf of boards of directors with respect to corporate incidents and preparedness.

CYBERSECURITY IN FINANCIAL SERVICES — DATA PROTECTION, CONFIDENTIALITY, AND BANK SECRECY

  • Counsel on the United States’ Fair Credit Reporting Act and the Fair and Accurate Credit Transactions Act (FACTA), the Gramm-Leach-Bliley Act, and the Right to Financial Privacy Act, as well as numerous other federal and state privacy, data security, and data breach statutes and regulations, including the DOJ’s Bulk Data Transfer Rule.
  • Advise on cybersecurity obligations under EU and UK financial services laws, including the EU’s Market Abuse Regulation and UK’s Financial Conduct Authority Rules and Takeover Code.

PHARMACEUTICAL, HEALTHCARE, AND DIGITAL HEALTH AND WELLNESS

  • Advise on cybersecurity requirements under the U.S. Health Insurance Portability and Accountability Act (HIPAA) and the Health Information Technology for Economic and Clinical Health (HITECH) Act, as well as state laws and regulations.
  • Provide counsel on cybersecurity obligations under EU laws, including those applicable to clinical trials and UK’s National Health Service and EU data protection requirements for health information.

PUBLIC POLICY AND GOVERNMENT STRATEGIES

  • Frequently work alongside the firm’s Government Strategies practice in navigating congressional investigations, legislative lobbying, regulatory policy guidance and formulation, and issue monitoring/due diligence.
  • Engage with the FTC, Secret Service, DOJ, Department of Homeland Security, elements of the intelligence community and other departments and agencies, as well as state attorneys general and state regulators.
  • Interact with the European Data Protection Board and data protection authorities in various EU Member States.
  • Communicate with the UK’s ICO, the National Cybersecurity Centre, and the Serious Fraud Office.