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WILLIAM LONG is a global co-leader of Sidley’s highly ranked Privacy and Cybersecurity practice and leads the EU Data Protection practice. He also serves on the firm’s COVID-19 Task Force. William advises international clients on a wide variety of GDPR, data protection, privacy, information security, social media, e-commerce and other regulatory matters.

William has been a member of the European Advisory Board of the International Association of Privacy Professionals (IAPP) and on the DataGuidance panel of data protection lawyers. He is also on the editorial board of e-Health Law & Policy and also assists with dplegal (“data privacy” legal), a networking group of in-house lawyers in life sciences companies examining international data protection issues.


+44-20-7360-2061

William RM Long

Partner
Sidley
London

Practice Area: Privacy and Cybersecurity

All-Star

WHAT CLIENTS SAY

"William has a great track record in this area and he knows what he's doing."
"He has deep experience, so I know we're always in good hands."

MY CLIENT PHILOSOPHY

"Understand the client’s issues and business, provide practical solutions not just the law and always be responsive to the client’s needs."

– William RM Long

ALL-STAR BIOGRAPHY

WILLIAM LONG is a global co-leader of Sidley’s highly ranked Privacy and Cybersecurity practice and leads the EU Data Protection practice. He also serves on the firm’s COVID-19 Task Force. William advises international clients on a wide variety of GDPR, data protection, privacy, information security, social media, e-commerce and other regulatory matters.

William has been a member of the European Advisory Board of the International Association of Privacy Professionals (IAPP) and on the DataGuidance panel of data protection lawyers. He is also on the editorial board of e-Health Law & Policy and also assists with dplegal (“data privacy” legal), a networking group of in-house lawyers in life sciences companies examining international data protection issues.

Visit All-Star's Firm »


+44-20-7360-2061

William RM Long

Partner
Sidley
London

Practice Area: Privacy and Cybersecurity

M&A All-Star

ALL-STAR BIOGRAPHY

WILLIAM LONG is a global co-leader of Sidley’s highly ranked Privacy and Cybersecurity practice and leads the EU Data Protection practice. He also serves on the firm’s COVID-19 Task Force. William advises international clients on a wide variety of GDPR, data protection, privacy, information security, social media, e-commerce and other regulatory matters.

William has been a member of the European Advisory Board of the International Association of Privacy Professionals (IAPP) and on the DataGuidance panel of data protection lawyers. He is also on the editorial board of e-Health Law & Policy and also assists with dplegal (“data privacy” legal), a networking group of in-house lawyers in life sciences companies examining international data protection issues.

Visit All-Star's Firm »