Jonathan has a versatile practice covering all aspects of international and commercial law. Since joining the Bar, Jonathan has:
- acted as counsel and legal adviser to States, corporations, private individuals and NGOs in some of the most significant legal matters of the day (e.g. Brexit, the ICJ Chagos Request for an Advisory Opinion and Micula v Romania enforcement proceedings);
- represented clients in cases at all levels of the English courts (High Court, Court of Appeal and Supreme Court);
- acted for clients in arbitration proceedings under most of the major arbitral rules (e.g. ICC, UNCITRAL, LCIA);
- acted against States in arbitration enforcement proceedings before the English Courts, and acted for private parties in arbitration-related court proceedings;
- acted for Governments, opposition groups and private parties during multiple high stakes international negotiations, peace processes and cases before the UN (e.g. Sudan’s peace process and the Syrian peace process; cases before the UN Working Group on Arbitrary Detention, UN Special Rapporteurs and Universal Periodic Reviews);
- advised parties in States in transition on the drafting of post-conflict constitutions and associated issues such as state structure, decentralisation and elections;
- worked on a variety of cases relating to British Overseas Territories law; and
- been engaged by the Foreign & Commonwealth Office to advise on a continuing basis as an Assistant Legal Adviser for more than two years in relation to the law of treaties and Brexit.
Jonathan is ranked in Legal 500 for his work on Brexit and European law where he is commended by Silks for “the way he sparks off ideas”. His work with the Public International Law & Policy Group on the documentation of international crimes against the Rohingya has recently been cited by the International Criminal Court more than 20 times during the Court’s Decision Pursuant to Article 15 of the Rome Statute on the Authorisation of an Investigation into the Situation in Bangladesh/Myanmar, and was cited by the Prosecutor more than 50 times in her request to commence an investigation.
Jonathan is a Visiting Lecturer in public international law at King’s College London and a Senior Peace Fellow with the Public International Law & Policy Group in Washington DC. He has published and spoken widely on a variety of areas within international law and is a leading expert on peace processes and associated issues such as post conflict constitutions and transitional justice.