LLB(Hons), LLM(Harv), PhD(Melb)

Between 1995-97, Treasa worked with the Harvard Sussex Program on Arms Control and Arms Limitation and then with the Organisation for the Prohibition of Chemical Weapons in the Hague as a Political Affairs Officer. Since 1999, Treasa has worked at the Faculty of Law, University of Auckland, where she teaches various public international law related courses as well as a specialized course on Disarmament Law to undergraduate students and a seminar course on International Peace and Security in the postgraduate programme. Her research focuses on disarmament law. She published Humanitarian Disarmament: An Historical Enquiry with Cambridge University Press in 2020 and co-edited (with Dr Anna Hood) a collection of essays entitled Disarmament Law: Reviving the Field published by Routledge in 2021.

From 2014-2016, Treasa provided legal advice to the New Zealand Ministry of Foreign Affairs and Trade examining legal issues involved in nuclear weapons disarmament, in particular the legal relationship between the NPT and any nuclear weapons disarmament initiatives. She was closely involved in the lead-up to, and negotiations for, the Treaty on the Prohibition of Nuclear Weapons. In 2017, Treasa joined the delegation of United Nations Institute for Disarmament Research (UNIDIR) at the negotiations for that treaty. Treasa was a member of New Zealand’s Public Advisory Committee on Disarmament and Arms Control from 2016 – 2021.