
Sidley Austin LLP has a broad spectrum of expertise, advising on internal investigations, data breach litigation and generative AI initiatives. The firm’s clients cover a wide range of sectors, including technology, life sciences, defense and finance. David Lashway, an advisor on crisis management and investigations, and Alan Charles Raul, who advises tech, telecom and software clients, oversee the practice. Colleen Theresa Brown provides litigation and regulatory defense as well as support in internal investigations. Jennifer Seale is expert in regulatory compliance and data breach response. Jonathan Wilan specialises in compliance technology implementation. All mentioned lawyers are based in Washington DC.
Legal 500 Editorial commentary
- Profile
- Social
Key clients
- ABB Asea Brown Boveri Ltd.
- AT&T, Inc.
- Univision NOW
- SES Space & Defense, Inc.
- Walmart Stores, Inc.
Work highlights
- Acting as outside privacy and cybersecurity counsel for numerous leading global clients, such as Hilton, DXC Technology, and Ohio Farmers Insurance.
- Representing multiple clients on their exposure to the recent MOVEit data breach.
- Serving as lead counsel to multinational industrial technology giant ABB on cybersecurity matters with respect to the investigation and response to a global ransomware matter.
Lawyers
Hall of fame
The lawyers at the very top of the profession, widely known and respected by peers and clients for their longstanding involvement in market-leading work.

Practice head
David Lashway; Alan Charles Raul
Other key lawyers
John Woods; Jennifer Seale; Jonathan Wilan; Colleen Theresa Brown