Stefan Moser was born in Munich in 1971 and trained as an economist and a lawyer. He joined the Commission in 2000 in DG Competition to work on control of state aid to public undertakings and services, notably financial institutions. 

From 2005 to 2009, he worked in DG Environment on climate and environment policy, notably greenhouse gas emissions trading, transport emissions and air quality. 

From 2009 to 2015, he dealt with policy coordination in the Secretariat-General, in particular on climate, energy, environment, transport, agriculture and maritime policies. 

From 2015 onwards, he has served as head of unit in DG Energy, first on energy security and safety, and then on energy efficiency of buildings and products.