Ambassador António de Almeida-Ribeiro was born in Lisbon and graduated in 1976 from the Faculty of Law (Legal and Political Sciences), University of Coimbra.

He joined the Portuguese Ministry of Foreign Affairs in 1979, where he has held a variety of positions, among which Director General for Administration, Political Director and Secretary General.

Throughout his career, he has served as Ambassador of Portugal to Argentina, Egypt, the Holy See, the Sovereign Order of Malta and Austria, where he was also Permanent Representative to the International Organizations based in Vienna, among other appointments around the world.