- Senior Research Fellow, All Souls College (from 2015)
- Von Neumann Fellowship, Institute for Advanced Study, Princeton (from 2014 to 2015)
- Long-Term Visitor, Institut des Hautes Etudes Scientifiques, CNRS since 2012 (from 2012 to 2015)
- CNRS, Institut de Mathématiques de Jussieu (from 2007 to 2012)
- IPDE Postdoctoral fellowship, Mittag-Leffier Institute, Stockholm and MPIM, Bonn (from 2006 to 2007)
- Postgraduate studies, Ecole Normale Supérieure and Université de Bordeaux (from 1999 to 2006)
- Undergraduate, University of Cambridge (from 1996 to 1999)
- Arithmetic geometry
- Quantum field theory
- 'Mixed Tate Motives over Z', Annals of Mathematics, vol. 175, no. 1 (2012), 949-976.
- (with O. Schnetz), 'A K3 in phi^4', Duke Mathematical Journal, vol. 161, no. 10 (2012), 1817-1862.
- 'Multiple Zeta values and periods of moduli spaces M_{0,n}', Ann. Scient. Ec. Norm. Sup., 4 serie, t. 42 (2009), 373-491.
- 'Dedekind Zeta motives for totally real fields', Inventiones (January 2013), DOI: 10.1007/s00222-012-0444-x.
- 'The massesless higher-loop two-point function', Comm. in Math. Physics, 287, No. 3 (2009), 925-958.
- ICM Section Speaker (2014).
- CNRS Bronze Medal (2012).
- Prix Elie Cartan, French Academy of Sciences (2012).
- ERC Starting Grant (2010).