Invited speaker at the following conferences/workshops:
- Théorie des représentations à Lyon (26-30.06.2023), University of Lyon, France
- INdAM Meeting Approximation Theory and Numerical Analysis meet Algebra, Geometry, Topology (5-9.09.2022), Cortona, Italy
- Arithmetic Aspects of Algebraic Groups (12-17.06.2022), BIRS Banff, Canada
- The 4th Canada-Mexico-USA conference in representation theory, non-commutative algebra, and categorification (09-12.06.2022), Northeastern University, Boston, USA
- Meeting of CMS Special Session on Descent methods in Algebra, Geometry and Topology (04.06.2022), MUN St.John’s, Canada
- Groups, Rings, Lie and Hopf algebras (30.05-02.06.2022), MUN St.John’s, Canada
- Petersburg Motives (on the occasion of Ivan Panin’s 60th birthday) (2-6.09.2019), St.Petersburg, Russia
- Meeting of CMS Special Session on Equivariant Methods in Differential and Algebraic Geometry (8-10.06.2019), Regina, Canada
- Combinatorial Algebra meets Algebraic Combinatorics (25-27.01.2019), University of Ottawa and Carleton University, Canada
- ABC Algebra Workshop (10-11.11.2018), University of Washington, Seattle, USA
- Affine Algebraic Groups, Motives and Cohomological Invariants (16-21.09.2018), BIRS Banff, Canada
- Ottawa-Lyon-São Paulo Workshop on Representation Theory (03-07.07.2018), Carleton University and the University of Ottawa, Canada
- Motives: arithmetic, algebraic geometry and topology under the white-blue sky (03-07.07.2017), Ludwig-Maximilians-Universitat Munich, Germany
- Beyond Toric Geometry (07-12.05.2017), BIRS Casa Matematica Oaxaca, Mexico
- Algebraic Groups (24-28.04.2017), Oberwolfach, Germany
- Algebraic Cobordism and Projective Homogeneous Varieties (31.01.2016-05.02.2016), Oberwolfach, Germany
- Meeting of CMS Special Session on Cohomological Methods in Quadratic Forms and Algebraic Groups (6-7.12.2015), Montreal, Canada
- (A)round forms, cycles and motives (08-12.09.2014), University of Mainz, Germany
- Structure of Algebraic Groups (23-27.06.2014), Universite Lyon 1, France
- AMS Southeastern Spring Sectional Meeting Galois Cohomology and the Brauer Group (23.03.2014), University of Tennessee, USA
- Algebraic Groups (08-12.04.2013), Oberwolfach, Germany
- Meeting of CMS Special Session on Geometry of Algebraic Varieties (07-10.12.2012), Montreal, Canada
- Joint Mathematics Meetings AMS Special Session on Linear Algebraic Groups: Their Arithmetic, Geometry, and Representations (04-07.01.2012), Boston, USA
- Ramification in Algebra and Geometry (16-20.05.2011), Emory University, USA
- K-Theory and Motives (22-25.03.2011), University of California at Los-Angeles, USA
- Motives and Homotopy Theory of Schemes (16-22.05.2010), Oberwolfach, Germany
- Mini Course-2009 “Torsors and Geometry of Quadrics” (22-26.06.2009), Lens, France
- Quadratic Forms and Linear Algebraic Groups (10-15.05.2009), Oberwolfach, Germany
- Quadratic forms, Algebraic groups, Algebraic cobordism and Related Topics (26-30.08.2008), University of Nottingham, UK
- Workshop “Algebraic cycles, motives and A1-homotopy theory over general bases” (13.02-16.02.2007), Universitat Regensburg, Germany
- Algebraic groups, quadratic forms and related topics (02.09-07.09.2006), Banff, Canada
- Quadratic forms and linear algebraic groups (25.06-01.07.2006), Oberwolfach, Germany
- Mini-Course: “Quadratic Forms” (19.06-23.06.2006), Lens, France
- Workshop “Quadratic Forms, Linear Algebraic Groups, and Related Topics” (09.09 – 16.09.2005), Nottingham, UK
- Workshop on “Algebraic K-Theory, Linear Algebraic Groups and Related Structures” (09.02-11.02.2005), Bielefeld, Germany.
- Workshop on Algebraic K-Theory (02.10 – 05.10.2004), Centre de Recherches Mathematiques, Universite de Montreal, Canada
- Mini-cours, Lens, Juin 2004 “Formes Quadratiques” (21.06 – 25.06.2004), Universite d’Artois, France
- Workshop on Linear Algebraic Groups, Quadratic Forms and Related Topics (01.02 – 05.02.2004), Eilat, Israel
- Short communication at Workshop on Algebraic Groups, Quadratic forms and related topics (30.06 – 04.07.2003), Universite Franch-Comte Besancon, France.
- Algebraic K-Theory (04.08-10.08.2002), Mathematisches Forschungsinstitut Oberwolfach, Germany
- Workshop on Galois Cohomology and Linear Algebraic Groups (24 – 28.06.2002), Institute Bernoulli, EPFL, Lausanne, Switzerland
- Quadratic Forms and Algebraic Groups (12 – 18.05.2002), Mathematisches Forschungsinstitut Oberwolfach, Germany
- Workshop on Witt Groups of Algebraic Varieties (05 – 09.03.2001), Universitaet Muenster, Germany
- Short communication at the Workshop on “Quadratic Forms and their Applications” (05 – 09.07.1999), University College Dublin, Ireland
- Short communication at Summer School on “K-theory and Algebraic Groups” (28.06 – 03.07.1998), Levico-Terme (near Trento), Italy