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We are delighted to be joined by a team of very experienced tutors at our 'Negotiating Maritime Boundaries' workshop.


Ms Davinia Aziz, Senior State Counsel in the International Affairs Division of the Attorney-General’s Chambers, Singapore

Ms Rosemarie Cadogan, former Legal Adviser, Ocean Governance and Natural Resources Advisory Division, Commonwealth Secretariat

Mr Henning Dobson Knudsen, Senior legal counsel and leader of the Law of the Sea and Maritime Delimitation Secretariat in the Danish Ministry of Foreign Affairs

Judge Liesbeth Lijnzaad, Judge, International Tribunal for the Law of the Sea and former Legal Advisor, Netherlands Ministry of Foreign Affairs

Professor Martin Pratt, Director, Bordermap Consulting Ltd

Workshop Presentations

Workshop Photographs

IBRU brand colours in a line


Davinia Aziz IBRU Workshop tutor 

Ms Davinia Aziz, Senior State Counsel in the International Affairs Division of the Attorney-General’s Chambers, Singapore, is on secondment as legal adviser in The Hague Diplomatic Office of the Embassy of the Republic of Singapore to Belgium, The Netherlands & Luxembourg and Mission to the European Union, holding the rank of Minister-Counsellor.  At the Embassy, her portfolio includes the international legal institutions in The Hague, such as the Permanent Court of Arbitration and the International Court of Justice (ICJ). Davinia is a government lawyer of some 20 years’ standing. She has done advisory and representational work across all areas of public international law, including dispute management, the law of the sea and maritime boundaries. In particular, she worked in Singaporean teams implementing the 2008 ICJ Judgment in Sovereignty over Pedra Branca/Pulau Batu Puteh, Middle Rocks and South Ledge.

IBRU Tutor Rosemarie Cadogan

Rosemarie Cadogan, International Lawyer and Policy Advisor, Commonwealth Secretariat, has over fifteen years experience developing public policy regulatory frameworks, administrative policies and strategies relating to maritime boundary delimitation and integrated ocean management. As Legal Negotiator on the Guyana Negotiating Team, she applied public and private international law principles towards securing rights to Guyana’s maritime space in bilateral maritime delimitation negotiations, maritime enforcement (ship rider) agreements¸ an exclusive economic zone (EEZ) Cooperation Zone Agreement and reciprocal fisheries agreements. As Legal Adviser with the Commonwealth Secretariat, she supported the conclusion of 6 maritime boundary agreements and 5 ocean governance policies in the Eastern Caribbean and Pacific regions, review of African blue economy frameworks, implementation of a blue economy roadmap in Seychelles and advancement of oceans and trade economy strategies in Belize and Barbados. Rosemarie is admitted to the Bar is Guyana and Canada and holds a Masters’ Degree in Marine and Environmental Law from Dalhousie University, Canada, a Post Graduate Diploma in International Relations from the University of Guyana, an LLB from the University of the West Indies and Prince 2 Certification in Project Management.

IBRU Workshop tutor Henning Dobson Knudsen

Henning Dobson Fugleberg Knudsen, Senior Legal Consultant, Danish Ministry of Foreign Affairs has for more than a decade been responsible for all UNCLOS matters within the Kingdom of Denmark, including submission of data regarding continental claims south, north east and north of Greenland to the Commission on the Limits of the Continental Shelf (CLCS). Henning has acted as legal council and Deputy Head of Delegation in a number of delimitation negotiations and dialogues inter alia with Iceland, Norway, Poland and Sweden. Furthermore, he currently acts as legal council and Deputy Head of Delegation in the negotiations with Canada regarding the sovereignty over Hans Island and delimitation of continental shelf beyond 200 M south of Greenland. Henning holds master degrees in law from the University of Aarhus, the University of Oslo and the University of Tromsø, respectively, and has worked as Attorney-at-Law in Norway, Denmark, USA and Greenland. Henning is admitted to the bar in Denmark.  Henning is listed as Expert on Maritime Boundary Delimitation at IHO and as Conciliator and Arbitrator under UNCLOS Annex V and VII

IBRU Tutor Liesbeth Ljinzaad 

Dr. Liesbeth Lijnzaad, Judge, the International Tribunal for the Law of the Sea (ITLOS), has been a Judge since 2017 and is also a member of the Seabed Disputes Chamber, the Chamber for Summary Procedures as well as the Chamber for Maritime Delimitation Disputes of the Tribunal. She is a Member of the Permanent Court of Arbitration, and a conciliator and arbitrator under Annexes V and VII of the Convention on the Law of the Sea.

Previously, she was the principal Legal Advisor on Public International Law at the Dutch Ministry of Foreign Affairs, and head of its international law department (2006-2017). In her capacity as government lawyer, Lijnzaad has been active in many fora, and has accumulated a wide range of experience in the practice of international law. As Legal Advisor she participated in the 6th Committee of the UN General Assembly, as well as the EU’s working group on Public International Law (COJUR) and the Comité Ad Hoc de Droit International (CAHDI) of the Council of Europe, both of which she has also chaired.

She has acted as Agent for the Netherlands in cases before the International Court of Justice, the International Tribunal for the Law of the Sea, the Permanent Court of Arbitration, the International Criminal Court, as well as the US Supreme Court.

Dr. Lijnzaad is also endowed Professor Practice of International Law at Maastricht University (since 2011). She is an occasional lecturer at the Dutch Academy for Government Lawyers (Academie voor Overheidsjuristen), at IBRU and the Graduate Institute in Geneva (IHEID, Institut des Hautes Études Internationales et du Développement). She is the chair of the Supervisory Board of the T. M. C. Asser Institute in The Hague. Her research interests are amongst others the Law of the Sea, the Laws of Armed Conflict, Feminism and International Law as well as the Sources of International Law.


IBRU Tutor Martin Pratt 

Professor Martin Pratt, Director, Bordermap Consulting, is an internationally-respected expert in boundary-making, border management and territorial dispute resolution, with over twenty years' experience working with governments, international organisations, businesses, scholars and practitioners around the world to resolve and prevent boundary-related conflict. He has extensive practical experience in maritime boundary negotiations and third-party adjudication of boundary and sovereignty disputes. Martin worked at IBRU from 1994-2015, leading the Centre's consultancy and professional training programmes for over a decade, and he remains an Honorary Professor in Geography at Durham University.