in 2011, he co-organised the first stephen schneider symposium (boulder, colorado, us). in 2013, he co-chaired the first interdisciplinary symposium on sustainable development in namur (belgium), and co-chaired its second edition in 2015 in louvain-la-neuve (belgium). he personally briefed several heads of state, many ministers and ceos about climate issues, and has been or is member of several international scientific advisory or editorial boards (eu fp7 research programme, dutch climate research programme, météo-france, eu jpi-climate tab, royal meteorological institute (belgium), the leading journal "climatic change ", established by stephen schneider).