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William Grace



"A highly competent practitioner in regulatory matters; he has excellent technical skills backed by years of practical experience"

Legal 500

“Fantastic analytical skill.”

Legal 500

“Leaves no stone unturned.”

Legal 500

“Is able to tailor his advice to his client's situation.”

Legal 500

“Has an impressive grasp of the regulatory environment.”

Legal 500



William advises Jersey finance industry clients and international clients on financial services related disputes whether civil, criminal, contentious regulatory or a combination. This includes advisory work and advocacy. His specific expertise is in advising on money laundering matters (including corruption), regulatory and compliance investigations, disputes in the banking and trusts sectors, sanctions, production orders including TIEA work, insider dealing, reporting duties, asset recovery, reciprocal enforcement, cyber related risk and international mutual assistance generally.

He places particular emphasis on working alongside clients and their in-house lawyers/compliance staff and other external advisers to implement risk management based solutions to disputes in the regulated sector. He is experienced in politically sensitive and complex matters involving multiple legal issues and jurisdictions. He often advises on higher risk business in the financial services regulated sector, whether that is in client take on, transactional support or M&A support.

In addition to acting for Jersey regulated financial services businesses, he also acts for PLCs, individuals and foreign states.

He is a member of the Royal Court Rules Committee advising and assisting the Royal Court in its rule making capacity


Practised in England before coming to Jersey in 1996.  Advocate of the Royal Court of Jersey since 1999. Joined Carey Olsen 2002.

Awards and accolades


William is recognised by Legal 500 in their 'Hall of Fame' for regulatory and white-collar crime, as well as being ranked for dispute resolution. 

L500 Hall of Fame