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Mark Dunster


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 former Chairman of the Guernsey Association of Compliance Officers and of the Guernsey Bar Association, known as Bâtonnier.

Mark is a current member of the States of Guernsey legislative review committee advising on the implementation and drafting of new laws and ordinances. Mark is also a tribunal member (that is judge) on various appeal tribunals including those on planning and social security legislation. He was also appointed as Adjunct Professor of Civil Litigation by the Guernsey Bar.


Mark was called as a barrister in 1994 and practised in London before returning to his native 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 acts as both an executive and non-executive director of a number of Guernsey (and non Guernsey) companies in sectors as wide as trust and fiduciary services, electronic gaming, credit card payment processing, commercial real estate and investment holding. Mark holds the Institute of Directors Chartered Director status. Mark was a member of Guernsey's Health and Social Services Department between 2004 and 2008. He was formerly Connétable of St Pierre du Bois and is now a Douzenier for that parish.

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"Precisely the type of calm and straight-talking lawyer that is required in a difficult situation"

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"Provides outstanding advice and service, with great clarity and calmness throughout very demanding cases."

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"He's a very well-known advocate. He's very much a go-to person. He's very responsive and would be the first person we would go to for regulatory issues."

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“Exceptional service backed by excellent industry knowledge.”

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