- 18.09.2018 BALATON2018 – Feynman Memorial Meeting, Balatonfüred
- 11.06.2018 Summer school on structures in local quantum field theory, Les Houches
- 26.02.2018 Amplitudes and Periods, HIM Bonn, workshop
- 30.01.2018 Humboldt University Berlin, Habilitandenkolloquium
- 20.11.2017 Humboldt University Berlin, seminar
- 26.10.2017 KMPB Workshop Elliptic Integrals, Elliptic Functions and Modular Form in Quantum Field Theory, DESY Zeuthen
- 09.06.2017 The elliptic/missing Feynman integrals, ETH Zürich, workshop
- 01. and 02.06.2017 Fourth International Workshop on Zeta Functions in Algebra and Geometry, Bielefeld, workshop
- 23.02.2017 Trinity College, Dublin, seminar
- 08.02.2017 Amplitudes: practical and theoretical developments, Mainz, workshop
- 14.07.2016 5th International Congress on Mathematical Software, Berlin, conference
- 20.06.2016 KMPB day, Kolleg Mathematik Physik Berlin
- 26.04.2016 Loops and Legs in Quantum Field Theory, Leipzig, conference
- 18.01.2016 ACAT 2016, Valparaiso, Chile, conference (plenary talk)
- 09.07.2015 Amplitudes 2015, ETH Zürich, conference
- 01.12.2014 Workshop on Multiple Zeta Values, Modular Forms and Elliptic Motives II, ICMAT Madrid
- 11.06.2014 Les Houches, summer school
- 14.03.2014 Cambridge University, seminar
- 21.01.2014 Humboldt University Berlin, Habilitandenkolloquium
- 13.01.2014 Humboldt University Berlin, seminar
- 11.07.2013 Polylogarithms as a Bridge between Number Theory and Particle Physics, Durham, workshop, video
- 16.04.2013 Johannes Gutenberg University Mainz, seminar
- 21.03.2013 Feynman Graphs and Motives, Bingen, spring school,
- 10.09.2012 Frontiers in Perturbatibe Quantum Field Theory, Bielefeld
- 02.07.2012 Periods and Motives, Madrid
- 26.06.2012 Quantum Field Theory, Periods and Polylogarithms III, Berlin
- 19.04.2012 Loops and Legs 2012, Wernigerode
- 10.02.2012 Humboldt University Berlin, The „What is …?“ seminar
- 02.02.2012 DESY Zeuthen, seminar
- 14.11.2011 Humboldt University Berlin, seminar
- 11.05.2011 University of Liverpool, seminar
- 29.03.2011 DPG Spring-Meeting, Karlsruhe (invited talk in the mathematical physics section)
- 27.01.2011 Humboldt University Berlin, seminar
- 14.12.2010 Universität Freiburg, seminar
- 27.04.2010 Loops and Legs 2010, Wörlitz
- 16.04.2010 Numbers, Periods and Quantum Field Theory, Durham, workshop
- 07.01.2010 RWTH Aachen, seminar
- DPG Spring-Meeting 2009, München
- Sept. 2008 Bullay/Mosel, graduate school meeting
- 15. and 29.05.2008 Jonannhes Gutenberg-University Mainz, (SFB TR 45), seminar
- DPG Spring-Meeting 2008, Freiburg
- 12.12.2007 Durham University, workshop