I joined the University of Leicester as a Lecturer in International Politics in January 2012, was promoted to the position of Associate Professor in International Politics in 2014, and to Professor of International Politics in 2020. Prior to this I was a Visiting Lecturer at the University of Birmingham (where I completed my PhD in 2011) and a Teaching Fellow at the University of Warwick.

During 2010, I was a Visiting Fellow at the Center for Arms Control and Non-Proliferation in Washington DC. From September to December 2015, I was a Visiting Scholar at the James Martin Center for Nonproliferation Studies in Monterey, California. In Spring 2017, I took up a Fellowship position at the Norwegian Nobel Peace Institute in Oslo. From September 2017 to January 2020 I was Director of Research for Politics and IR.

I am a member of the cyber-nuclear security threats task force run by the Nuclear Threat Initiative, an Honorary Research Fellow in Nuclear Strategy at the Institute for Conflict, Cooperation and Security at the University of Birmingham, and a member of the Euro-Atlantic Security next generation working group.