?15-21 Apr 2018? | Superexpanders and their coarse geometry | MFO Oberwolfach, Germany

?3-6 Apr 2018? | Topological and homological methods in group theory | Universitaet Bielefeld, Germany

?Mar 2018? | Introductory school to L2 invariants and their positive characteristic analogues | ICMAT, Madrid, Spain

?Feb 2018? | UT Austin | Austin, USA

?Feb 2018? | Notre Dame | South Bend, USA

?Feb 2018? | CUNY and NYU | New York, USA

?22-26 Jan 2018? | New Methods for Zimmer's Conjecture | IPAM, Los Angeles, USA

29 Nov - 2 Dec 2017 | University of Chicago | Chicago, IL, USA

10-12 Nov 2017 | Hyperbolic 3-Manifolds and Beyond (Virginia Topology Conference) | University of Virginia, Charlottesville, USA

27-29 Oct 2017 | No Boundaries (Farb Conference) | University of Chicago, Chicago, USA

7-11 Aug 2017 | GEAR Senior Retreat | Stanford University, Palo Alto, USA

23-30 Jul 2017 | Indiana University | Bloomington, IN, USA

21 Jun - 4 July 2017 | SNU and KAIST | Seoul and Daejeon, South Korea and Tokyo, Japan

8-12 May 2017 | Workshop `Approximation, Deformation, Quasification' | Isaac Newton Institute, Cambridge, UK

27 Feb - 5 Mar 2017 | `Groups of dynamical origin' | UNAM, Mexico City, Mexico

14-16 Feb 2017 | University of California -- Berkeley | Berkeley, CA, USA

8-12 June 2015 | Workshop on Diffeomorphism Groups | University of California -- Berkeley, Berkeley, CA

May 2015 | Midwest Topology Seminar | University of Chicago, Chicago, IL

17-19 Apr 2015 | Bloomington Geometry Workshop | Indiana University, Bloomington, IN

26-28 Mar 2015 | Teichmüller Modular Groups (Ivanovfest) | University of Chicago, Chicago, IL

19-21 Mar 2015 | AMS Central Sectional Meetings | Michigan State University, East Lansing, MI

Sep 2014 | Thurston Legacy Conference | Cornell University, Ithaca, NY

25-27 Apr 2014 | Workshop on Thin Groups | University of Michigan, Ann Arbor, MI

24-28 Mar 2014 | Asymptotic Properties of Infinite Groups | IHP, Paris, France

9-14 Sep 2013 | Geometric and Analytic Group Theory | Ventotene, Italy

27-31 Aug 2013 | Geometry and Groups after Thurston | Hamilton Geometry and Topology Workshop, Hamilton Institute, Dublin, Ireland

12-16 Aug 2013 | Geometric Topology in NYC | Columbia University, New York City, NY

13-15 Jun 2013 | Workshop on Geometric Topology | Calvin College, Grand Rapids, MI

23-26 May 2013 | Workshop on Cohomology of Arithmetic Groups | University of Chicago and Northwestern University, Chicago, IL

29-31 Mar 2013 | Workshop on Random Walks on Groups | University of Michigan, Ann Arbor, MI

20-21 Oct 2013 | AMS Special Session: Interactions between Geometry and Topology | Ohio State University, Akron, OH

28-30 Jun 2013 | Workshop on Geometric Topology | Oregon State University, Corvallis, OR

2 Jun 2013 | Geometric Structures on Manifolds (Canaryfest) | University of Chicago, Chicago, IL

Summer 2009 | Dynamical Systems Summer School | Utrecht University, Utrecht, The Netherlands