In carrying out their mission, the High Representative is supported by the European External Action Service (EEAS). The EEAS works in co-operation with EU member states' diplomatic services. It comprises officials and agents from the EU, as well as personnel seconded from national diplomatic services.
The High Representative is appointed by the European Council acting by a qualified majority, with the agreement of the President of the Commission for a mandate of five years.
The role was created under the Treaty of Amsterdam and expanded by the Treaty of Lisbon. Since 1 December 2019, the position has been held by Josep Borrell Fontelles, who succeeded Federica Mogherini (2014-19), Catherine Ashton (2009-14) and Javier Solana (1999-2009).