Gehan Gunatilleke is a lawyer specialising in human rights and constitutional law. He is a former UN advisor to the Sri Lankan Foreign Ministry, where he specialised in international treaty compliance. He was also Research Director at Verité Research, an independent think tank based in Colombo, Sri Lanka. Gehan’s recent publication, The Chronic and the Entrenched: Ethno-religious Violence in Sri Lanka, was published in 2018. His advocacy work focuses on combating ethno-religious violence, and campaigning against state regulation of mainstream and social media.

Gehan is currently a doctoral candidate in law at the University of Oxford, and a graduate tutor in human rights at St Catherine's College, Oxford. He is also a researcher at the Bonavero Institute of Human Rights. His current research focuses on state authority to restrict the freedom of religion and the freedom of expression under international law. Gehan completed his bachelor’s degree in law at the Faculty of Law, University of Colombo. He also has master’s degrees from Harvard Law School, where he was a Fulbright scholar, and New College, Oxford, where he was a Commonwealth Scholar