A lawyer by training, Daniel Mes started his career at the European Commission in its competition department. There he worked on transport and digital technology files. During the last Commission term, he managed relations with the European Parliament and the Council, including on transport files, and was a speechwriter to Margrethe Vestager. Since 1 December 2019, he works in the Cabinet of Executive Vice-President Frans Timmermans on the European Green Deal in Transport.