William Long

Partner
Sidley Austin LLP

William Long advises international clients on a wide variety of social media, data protection, privacy, information security, e-commerce and other regulatory matters. William has experience with EU and international e-commerce, consumer, social media, data protection and payments projects, advising on e-commerce, consumer and social media regulation, data security and other data protection issues. He is a regular speaker on social media, data protection and e-commerce matters.

William is a member of the Association of Privacy Professionals European Board and a co-founder of the Social Media Governance Forum, a networking group of companies involved in social media, and was previously in-house counsel to one of the world’s largest international financial services groups as their e-commerce counsel establishing Interactive Investor which is one of the world’s largest online consumer financial services businesses with over 8 million users. He has been a member of a number of working groups in London and Europe looking at the EU regulation of e-commerce and data protection and spent a year at the UK’s Financial Law Panel (established by the Bank of England), as assistant to the Chief Executive working on regulatory issues with online financial services. He also writes extensively for a number of journals including Journal of Medical Research Law & Policy, data protection law & policy, Journal of Electronic Business Law, Journal of eCommerce Law and Policy and e-finance & payments law & policy.

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