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Carey Olsen

Work 01481 727272
Fax 01481 711052
Carey Olsen, Mark Dunster, St Peter Port, GUERNSEY

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Mark Dunster

Work +44 (0)1481 732015
Carey Olsen

Work Department

Dispute resolution and litigation


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.

He also holds a number of non-executive director positions for Guernsey businesses including in the eGaming, Fiduciary, Transport and Real estate sectors and has been awarded Chartered Director status by the Institute of Directors.

Mark was appointed as Adjunct Professor of Civil Litigation to the Guernsey Bar, as well as Adjunct Professor of Criminal Litigation: one of the only two practitioners from the private Bar to be so appointed to these roles.


Called as barrister 1994; qualified as advocate 1997; partner Carey Olsen 2001; Notary Public 2006.




Current member of the States of Guernsey legislative review committee advising on the implementation and drafting of new laws and ordinances. Current judicial member of tribunals for both planning and social security appeals. Former chairman of the Guernsey Association of Compliance Officers; former chairman of the Guernsey Bar Association known as Bâtonnier.


Elizabeth College, Guernsey; Keele University (1992); College of Law (1993 CPE); Inns of Court School of Law (1994 English Bar Finals); University de Caen Basse-Normandie (1997 Certificat d’Etudes Juridiques Francaise et Normandes); 2001 Diploma in Civil and Commercial Litigation; 2003 Masters in Advance Civil and Commercial Litigation; Notary Public 2006.



Within: Employment

Following a number of new hires and successful tender bids, Carey Olsen’s employment practice has seen a significant expansion of its client base of local and international businesses, financial services institutions and trust companies. A particularly strong contentious offering receives regular instructions for constructive and unfair dismissal claims, breach of trust claims, executive exits and contractual disputes. Non-contentious work include advising on employee and director agreements, contract reviews, as well as assisting the corporate team on the employment aspects of corporate transactions. Employment litigators Elaine Gray and Mark Dunster head the team, while highly-praised counsel Carly Parrott ('formidable negotiator') has a strong reputation for her work with financial services, professional services, commercial and retail clients.

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Legal Developments in Guernsey

Legal Developments and updates from the leading lawyers in each jurisdiction. To contribute, send an email request to
  • In re B; B v T (Court of Appeal, 11 July 2012)

    A trustee's duty of confidentiality has recently been discussed and to some extent clarified in the recent Guernsey Court of Appeal decision of In re B; B v T (Court of Appeal, 11 July 2012). This summary has been prepared to provide you with a summary of the case as well as the general issues raised, but is not intended to cover all matters or to provide commentary.   This summary does not constitute legal advice.
  • The Company Administration Regime in Guernsey

  • Guernsey Image Rights Legislation

    The Image Rights (Bailiwick of Guernsey) Ordinance 2012 (the Ordinance) and The Image Rights (Bailiwick of Guernsey) Regulations, 2012
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