On 1 November 1999 de Soto was selected as the Secretary-General's Special Adviser on Cyprus, with the rank of Under-Secretary-General; he held this post until the dismantling of the Special Mission to Cyprus following the April 2004 rejection of the Annan Plan for a Cypriot bizonal bicommunal federation divided along ethnic and religious lines.
Álvaro Uribe | Álvaro Obregón | Sōtō | Hernando de Soto | Marco Aurelio Soto | Jeff Soto | Jeff Scott Soto | Hugo Rafael Soto | Hernando de Soto (explorer) | Alvaro Vitali | Álvaro de Miranda Neto | Álvaro Colom | Talisa Soto | Soto | Geovany Soto | Álvaro Siza Vieira | Álvaro Espinoza | Álvaro Cunqueiro | Álvaro Carrillo | Álvaro Betancourt | Wilson Soto | Soto la Marina, Tamaulipas | Soto la Marina | Soto (food) | soto | Matías Soto | Juan Soto Ivars | Joel Soto | Jock Soto | Jaime Soto |
He was the legal advisor to Álvaro de Soto, the Special Cyprus Advisor of the UN's Secretary-General Kofi Annan and Ambassador at Large for Special Assignments at the Swiss Ministry for Foreign Affairs.