John Kelleher > Carey Olsen > St Helier, Jersey > Lawyer Profile

Carey Olsen

Work Department

Dispute Resolution and Litigation; Property Law.


Partner and head of dispute resolution and litigation at Carey Olsen, specialises in commercial disputes.

His litigation specialisms include: public law and judicial review; law of contract; property law; planning law and general commercial litigation.

He is a recognised leader in Jersey contract law and Jersey customary law. The many high-profile cases he has acted on include Les Pas Holding Limited v States of Jersey; J.P.M.O. and TOP Produce Ltd v States of Jersey; Anchor Trust v Jersey Financial Services Commission; and Jersey Financial Services Commission v Cater Allen Trust Co Ltd and others.

In 2017-2020, John was President of the Law Society of Jersey.


Barrister, Middle Temple 1991; advocate of the Royal Court of Jersey 1994; partner in the firm 1995. Qualified mediator.




Founding member of the Jersey Law Review; external supervisor for a PhD student on the property law of Jersey; associate of the Chartered Institute of Arbitrators. Fellow of the Royal Historical Society.


De La Salle College, Jersey; University of Warwick (1984 BA Hons History; 1991 PhD); City of London University (1990 MA Law); Université de Caen (1993 Certificate d’Etudes Juridiques Françaises et Normandes).

Lawyer Rankings

Jersey > Family

Carey Olsen advises high-net-worth individuals on a wide variety of family law matters, often in relation to cross-jurisdictional issues. The group is noted for its expertise in pre-nuptial agreements. It is also able to draw on the firm’s wider trusts, property, litigation, corporate and private client teams, where family law overlaps with other areas of law. Marcus Pallot takes the lead, with vast experience in divorce cases, also a well-trodden area for John Kelleher. Suzanne Kingston became a consultant in February 2021, providing expertise in complex financial matters, children arrangements following separation or divorce, and cohabitation matters. Senior associate Lauren Glynn is another key name for divorces and civil partnership dissolutions, as well as complex financial disputes arising from relationship breakdowns.

Jersey > Commercial property

Carey Olsen combines lawyers with expertise in corporate real estate, where Alex Ohlsson takes the lead, and with John Kelleher, contentious planning issues. It also benefits from in-house conveyancing expertise. The group has extensive experience in property portfolio management, as well as development projects and leasing issues. Counsel Will Whitehead  is increasingly active in the team, with commercial property transactional expertise, in addition to experience in construction and development work. Associate Lyndsay Houlette is an expert in mixed-use commercial developments and infrastructure projects.

Jersey > Dispute resolution > Dispute resolution

(Hall of Fame)

John KelleherCarey Olsen

Clients praise the team at Carey Olsen for being ‘technically very strong, collaborative and user friendly‘, handling the spectrum of trust-related disputes, as well as fielding a strong contentious insolvency offering, where it represents funds and companies, boards of directors and shareholders. John Kelleher lead’s the firm-wide dispute resolution practice group, bringing to bear substantial contentious financial services experience. Marcus Pallot  focuses on insolvencies, regulatory disputes and civil litigation, while Andreas Kistler is noted for the court-related aspects of trust and private wealth issues. William Grace dedicates his time to regulatory and white-collar criminal cases, acting on behalf of corporates. Counsel Louise Woolrich is known for multi-jurisdictional trust disputes. Richard Holden has left the firm for Walkers.