Adrien Estève is a postdoctoral researcher at the Center for International Studies (CERI-Sciences Po), in residence at IRSEM. His current research focuses on the involvement of security and defense actors in climate policies, on the emergence of international forums and networks on climate security, and on the recent evolutions of international conflictuality (lawfare). He holds a PhD in political science from Sciences Po Paris (2020), a MPhil in international and political expertise from Sciences Po Aix (2014) and a MPhil in political science from Sciences Po Paris (2015). He is currently in charge of the research group on "Environment and International Relations" at CERI and of the working group on "Environment and climate" at the Association for War Studies (AEGES). He was also a visiting scholar at Columbia University for the academic year 2017-2018 and in April 2019.