• AAAS Section A (Mathematics) Membership Engagement Chair, 2023
  • Standing Member, Microbiology and Infectious Diseases B Research Committee (MID-B), National Institute of Allergy and Infectious Diseases (NIAID), 2020 – 2024
  • AAAS Council Delegate, representing Section A (Mathematics), Feb. 2019 – Dec. 2022
  • Advisory Board Member, SIAM Activity Group on Dynamical Systems, 2018 & 2019
  • Chair, Jürgen Moser Lecture Selection Committee (SIAM), 2018
  • Editor-in-Chief, Physica D: Nonlinear Phenomena, 2008 – 2017
  • External Review Committee member, Department of Applied Mathematics, University of Colorado Boulder, March 2017
  • Member, Electorate Nominating Committee, AAAS Section A (Mathematics), 2015 – 2017
  • Member-at-Large, AAAS Section A (Mathematics), 2011 – 2014
  • Associate Editor, Nonlinearity, 2004 – 2015
  • Member, Nominating Committee, SIAM Activity Group on Nonlinear Waves and Coherent Structures, 2012 & 2014
  • Member, Kruskal Lecture Prize Selection Committee (SIAM), 2011
  • Chair, 2011 Math Awareness Month National Committee
  • Chair (2008) and member (2007), AWM-SIAM Kovalevsky Lecture Prize Selection Committee
  • Chair, Nominating Committee, SIAM Activity Group on Nonlinear Waves and Coherent Structures, 2006
  • Secretary, SIAM Activity Group on Nonlinear Waves and Coherent Structures, 2004 – 2006
  • Reviewer for major journals in my area of research
  • Reviewer for
    • the National Institute of Allergy and Infectious Diseases (NIAID)
    • the National Science Foundation (NSF)
    • the Engineering and Physical Sciences Research Council  (EPSRC, UK)
    • the US-Israel Binational Science Foundation
    • the Natural Sciences and Engineering Research Council of Canada (NSERC)
    • the Netherlands Organization for Scientific Research (NW0)