Mary Guest


Mary is an Associate Editor of EJIL:Talk! She qualified and practised as a senior associate in telecoms, media and technology at Clifford Chance LLP, following which she was Head of Legal – Commercial at The Football Association in England. After a spell at Linklaters LLP, she moved into an in-house General Counsel role within FMCG. She has completed an LLM at the University of Cambridge, for which she was awarded the Clive Parry Prize for International Law. Mary can be contacted at

Recently Published

Announcements: CfP ESIL Interest Group on International Organizations; CfP Revista Tribuna Internacional Law Journal; State Organs’ Activities on Social Media under IL Panel; International Human Rights Standards in Disaster Settings Course; CfS Cambridge Intentional Law Journal; International Law Colloquium; CfP Reforms at the UN Book

1. Call for Papers: Whataboutism, Reciprocity, Double Standards - Towards a Theory of Fairness in International Organizations. On Thursday 31 August the ESIL Interest Group on International Organizations is organising a workshop at the 2023 ESIL Annual Conference in Aix-en-Provence. Abstracts should be between 500 and 600 words, and be submitted, alongside a short biography of 200 words…

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Announcements: International Law in Courts Talk; CfP International Dispute Resolution Oversight; CfA UN Minority Rights Regime; Criminal Justice and HR E-Learning; CfP Ukraine and International Law; Shamima Begum CELI Lecture; Universal Declaration of HR Conference; Law of Council of Europe Summer School; CfP ILW; CfN Outstanding Achievement Award; CfN ABILA Book Awards; FGV Workshop; Spanish International Legal Podcast; Lund University Vacancy; Treaties & Private IL Conference; CfP International Criminal Justice

1. Fireside Talk: International Law Praxis On the Practice of International Law in Courts. In this fireside hybrid talk, the panel will discuss the importance of international law praxis - the challenges faced in its implementation, and ways to strengthen it. The following speakers will share their perspectives on the topic: Professor Dr. Attila Tanzi (Chair) (Full Professor…

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Announcements: Secondary Rules of Primary Importance in International Law Book Launch; Human Rights and Climate Change Workshop; Thessaloniki Summer Courses; Frontier Clash Panel; International Energy Law Lecture; ECtHR as an Actor Lecture; Dubrovnik Advanced Seminar & Training School; CfP Brawijaya Law Journal; CfP MenschenRechtsMagazin; Academy on Human Rights and Humanitarian Law; Summer Academy on the Continental Shelf; International Nuremberg Principles Academy Vacancy; UN Audiovisual Library of International Law

1. ESIL Book Launch – Secondary Rules of Primary Importance in International Law. Join on Monday 6 March 2023 at 16:00 CET for a virtual book launch of Secondary Rules of Primary Importance in International Law, edited by Gábor Kajtár, Başak Çali, and Marko Milanovic, the latest volume in the ESIL book series…

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