| President of Atmospheric Sciences Section, European Geosciences Union. |
2019-present |
| International Universities Climate Alliance, EPFL representative. |
2021 |
| European Research Council - Consolidator Grants Panel member (PE10) |
2020 |
| Swiss National Science Foundation, Ambizione Grants panel member. |
2019-present |
| Swiss Academy of Sciences, Geosciences Research Infrastructure Roadmap, Atmospheric Sciences co-Chair. |
2020-2021 |
| Science Board, Greek Institute for Research and Development |
2018-2020 |
| Joint Group of Experts on the Scientific Aspects of Marine Environmental Protection (GESAMP) – Working Group 38 (Atmospheric input of chemicals to the ocean) |
2017-2020 |
| Deputy President of Atmospheric Sciences Section, European Geosciences Union. |
2018-2019 |
| National Research Council, Committee on the Future of Atmospheric Chemistry Research, National Academy of Sciences |
2014-2016 |
| Secretary of Aerosols & Clouds, Atmospheric Sciences, American Geophysical Union. |
2012-2016 |
| PANhellenic infrastructure for Atmospheric Composition and climatE change (PANACEA) Scientific Advisory Board |
2018-2021 |
| ETH BACCHUS Scientific Advisory Board |
2014-2018 |
| Pacific Northwest National Lab Aerosol-Climate Initiative External Advisory Board |
2006-2011 |
| DOE Atmospheric Radiation Measurement Climate Research Facility Science Board |
2007-2011 |
| Research Institute Evaluator, General Secretariat for Research and Technology, Greece |
2013-2016 |
| Committee on Nucleation and Atmospheric Aerosols, Member. |
2013-present |
| Board of Directors, American Association for Aerosol Research |
2014-2017 |
| Editor, Atmospheric Chemistry and Physics |
2004-2019 |
| Conference Committee, 2022 International Aerosol Conference. |
2018-2022 |
| Conference Chair, American Association for Aerosol Research Annual Conference |
2014 |
| Conference Chair, International Aerosol Modeling Algorithms (IAMA) Conference |
2011 |
| Conference co-Chair, International Aerosol Modeling Algorithms (IAMA) Conference |
2013 |
| Conference Organization Committee, American Association for Aerosol Research |
2011-2015 |
| Student Liason Chair, American Association for Aerosol Research |
2009 |
| Tutorial Chair, American Association for Aerosol Research |
2009 |
| Education Outreach Chair, American Association for Aerosol Research |
2010 |
| Student Liason Committee, American Association for Aerosol Research |
2006-2009 |
| Education Outreach Committee, American Association for Aerosol Research |
2007-2010 |