INDIVIDUAL PROFILE

Jonathan Speck

High Net Worth 2026

Mourant

Ranked in 1 practice area

Offshore: Trusts Litigation

Jersey

2 years ranked

About

Provided by Mourant

High Net Worth

Practice Areas

A Jersey Advocate and Partner of Mourant Ozannes (Jersey) LLP, Jonathan specialises in commercial litigation, principally involving contentious and non-contentious trust cases. I’ve written and lectured about these topics around the world.

Jonathan has been a Partner since 1996 and previously served as Managing Partner of the Jersey Office and President of the Law Society of Jersey between 2014 and 2017. As the Chair of Mourant Group, a role he assumed on 1 February 2025, Jonathan is responsible for Board effectiveness and engagement with shareholders and stakeholders. Previously, he served as the firm's Senior Partner.

Professional Memberships

Association of Contentious Trust and Probate Specialists.

Society of Trust and Estate Practitioners (STEP).

Industry Sector Expertise

In 2017, Jonathan was elected as an Academician of the International Academy of Estate and Trust Law in recognition of his contribution to the profession.

Chambers Review

Provided by Chambers

Chambers High Net Worth

Offshore: Trusts Litigation - Jersey

Star Individuals

Individual Editorial

Jonathan Speck is a standout lawyer in Jersey who is well regarded for his skill as a litigator and courtroom advocate. He is senior partner at Mourant, and is engaged in both contentious and non-contentious trusts work.

View ranking table

Strengths

Provided by Chambers

Jonathan Speck is the best advocate in Jersey, and he is very good at the largest and most complicated contentious trust disputes.
Offshore: Trusts LitigationChambers High Net Worth
Jonathan Speck is one of the most respected lawyers in trust litigation in Jersey. He has a wealth of knowledge and experience.
Offshore: Trusts LitigationChambers High Net Worth
Jonathan Speck is a star of the market. His view is always a plus in complex matters. He has great experience and good sense. He supports clients by suggesting options that are aligned with the interests of the clients and their mindset.
Offshore: Trusts LitigationChambers High Net Worth
Jonathan Speck is the best Jersey lawyer. He is the leader and he has the ear of the court.
Offshore: Trusts LitigationChambers High Net Worth
Jonathan Speck is a tremendous advocate with a wealth of experience. He can be trusted with the most complex of problems and is particularly good at balancing considerations across jurisdictions. He also has great presentation skills.
Offshore: Trusts LitigationChambers High Net Worth