Thiébaut Weber is a trade unionist and former student activist in his native France. Born in Mulhouse, he studied history at the University of Haute-Alsace. He is a member of the French trade union Confédération Française Démocratique du Travail (CFDT) and in 2007 started work as their youth delegate, then in 2014 as political advisor on issues including international and European affairs. Between 2011 and 2013 he was President of the ETUC Youth Committee. He was elected as ETUC Confederal Secretary at the XIIIth Paris Congress in 2015.