Carey Olsen

Mark Dunster

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Practice Areas

Mark is a partner specialising in litigation, compliance and financial regulatory matters.

He undertakes a wide variety of commercial and civil litigation including insolvency work. He also advises institutions on regulatory matters including anti-money laundering, data protection, employment law, eGaming and renewable energy. He is an author of books on anti-money laundering and data protection.

Mark holds the International Association of Privacy Professionals "Certified Information Privacy Professional/Europe" qualification as part of his data protection practice.

He is the past Chairman of the Guernsey Association of Compliance Officers as well as the the former Chairman of the Guernsey Bar Association, known as Bâtonnier.


Mark was called as a barrister in 1994 and practised in London before returning to Guernsey where he qualified with the firm as an advocate in 1997. He has been a partner since 2001 and became a notary public in 2006. He is director of several Guernsey companies and is also an Institute of Directors certified director. He was formerly a judge on Guernsey’s real property taxation appeals panel.

Professional Memberships

He is the former Chairman of the Guernsey Bar Association known as Bâtonnier.