In a message on Twitter, the Foreign Minister acknowledged the commitment and dedication of the former deputy foreign minister, and wished him success in his new functions.
On Monday, Army General Raul Castro presented the 14 members of the Political Bureau of the Central Committee of the Communist Party of Cuba (PCC) and the six members of the Secretariat, including former ISRI Rector Rogelio Polanco.
Polanco, a diplomat, journalist and deputy to the National Assembly (Parliament), holds the position of head of the Ideological Department of the Central Committee.
Previously, he served as Cuban ambassador to Venezuela.
Meanwhile, Sierra worked as first secretary and official in the Europe Directorate of the Ministry of Foreign Affairs (MINREX) and deputy director of Dissemination and Information.
He was also Cuba’s ambassador to Peru and director for Latin America and the Caribbean at the Ministry of Foreign Affairs (MINREX).