He also served as Vice Minister of Foreign Affairs of Colombia (1985–1986) He worked in the Secretariat of the United Nations for the Commission of Truth in the peace process of El Salvador.

Also, he worked for the United Nations Development Program (UNDP) for the preparation of the Special Economic Cooperation Plan for Central America.

Ambassador Fernández de Soto served as International Arbitrator in various disputes from Commercial and Administrative Law matters.

Most recently, he served as Corporate Director for Europe at CAF, the Development Bank of Latin America based in Madrid, Spain (2012–2018).

[1] During his presidency, Fernandez de Soto visited Sierrea Leona, Loberia, Côte d'Ivoire and the African Union where he was able to witness the Commission's progress in peacebuilding.