Canadian Institute for Theoretical Astrophysics (CITA), Council (2022-) 

Institute for Computational Cosmology, Durham University, International Advisory Board (2021-)  

Journal of Cosmology and Astroparticle Physics (JCAP) editor (2021-)  

Canadian Astronomical Society (CASCA) Ground-based Astronomy Committee (2019-). Chair (2021-23)

Canada Natural Sciences and Engineering Research Council (NSERC) Discovery Grant Panel (2019-22).

UK Space Agency (UKSA) Space Programme Advisory Committee (SPAC) (2014-17).

UK Science and Technology Facilities Council (STFC) Newton Fund panel member, 2016.

European Space Agency (ESA) Astronomy Working Group (2013-16).

STFC Astronomy Grants Panel (2013-15). Astronomy Observation sub-panel chair 2015.

Isaac Newton Group of Telescopes Science Advisory Committee (2011-13).

European Astronet Working Group “next generation wide-field spectroscopy” (2009-11).