[4] He later worked at the foreign affairs ministry, where he was head of the EU Coordination Department and the Brexit Unit.

[5] In January 2020, Micallef was named European affairs advisor to Prime Minister Robert Abela.

The principal set of guidelines establishing the parameters for the Chief Negotiator were agreed upon and concluded during the 2017 Maltese Presidency of the Council of the European Union.

[7] In November 2020, he was appointed Head of Secretariat to the Prime Minister, a position equivalent to a chief of staff, succeeding Clyde Caruana.

[3] Upon his resignation, Micallef was considered a contender to succeed Marlene Bonnici as Permanent Representative of Malta to the EU.