Mathis is a Leverhulme Early Career Fellow in the Department of Sociology and a Junior Research Fellow at Trinity College. 

He pursues a multi-methodological research agenda on extraordinary social action. A large strand of his research focuses on the causes and consequences of social movements. Mathis' work also covers the rescue of Jews in Nazi-occupied Europe, political conflict, and collective trauma. 

Mathis' fellowship project investigates far-right mobilisation in the United States. 

Mathis received a DPhil in sociology from Nuffield College, University of Oxford, funded by the AHRC and Studienstiftung des deutschen Volkes.  

Research interests: political sociology, social movements