Leverhulme Trust Visiting Professorship Award, 2019 Justitia Regnorum Fundamentum Award, 2016 Marie-Claire Cordonier Segger is a full professor, senior executive, an international expert in policy, law and governance on climate change, biodiversity, human rights, trade, investment and financial law and the world's Sustainable Development Goals.

Cordonier Segger began her professional career working as a manager and senior advisor for the United Nations Environment Programme from 1998 to 2004.

From 2004 to 2006, Cordonier Segger worked as a course development expert and instructor at the National Judicial Institute of Canada and as seminar and lecture series coordinator for the Faculty of Law at Oxford University.

In 2015 Cordonier Segger acted as senior legal advisor to the presidency of the twenty-second meeting of the Conference of the Parties to the UNFCCC (2015–2017) and became executive secretary of the Climate Law & Governance Initiative (2015–2021).

As of 2019, she serves as Leverhulme Trust Visiting Professor[8] at the University of Cambridge and as a Fellow in Law & LLM/MCL Director of Studies at the Lucy Cavendish College.