Dr. Barnidge joined the University of Reading (UK) School of Law in 2007. His doctoral research explored issues related to non-state actors, state responsibility, and the due diligence principle in the context of the fight against terrorism. Dr. Barnidge has participated in the Hague Academy of International Law as a student in the public international law course (2005) and as a participant in the Centre for Studies and Research in International Law and International Relations (2006).

He has been the Book Review Editor of the Irish Yearbook of International Law and an Articles and Notes Editor of the North Carolina Journal of Law and Technology for a year each and currently serves on the Editorial Board of the Journal of the Middle East and Africa. He has been a visiting lecturer at the Interdisciplinary Center Herzliya, Israel (2008) and Uppsala University (2009) and participated in a ten day "Defending Democracy Defeating Terrorism" academic fellowship in Israel in June 2009 awarded by the Foundation for Defense of Democracies.

Dr Barnidge is the Principal Investigator for a British Academy UK-South Asia Partnership grant studying "India, the 123 Agreement, and Nuclear Energy: Issues of International Law" as part of a team of legal scholars at Reading and the Tamil Nadu Dr. Ambedkar Law University, Chennai, and has been awarded a Leverhulme Trust grant to study as part of an interdisciplinary team at Reading.