Professor Rolf-Dieter Heuer is a German particle physicist. From 2009 to 2015 he was Director General of CERN and from 5 April 2016 to 9 April 2018 President of the German Physical Society. Since 2015 he has been Chair of the European Commission's Group of Chief Scientific Advisors, and since May 2017 he has been President of the SESAME. Council