Berríos founded the Permanent Conference of Political Parties of Latin America and the Caribbean (COPPPAL), is a member of the Executive Council of the Latin American Human Rights Association (ALDHU), and Honorary President of the Socialist International (SI).
Berríos the Permanent Conference of Political Parties of Latin America and the Caribbean (COPPPAL)'ın kurucusu, Latin Amerika İnsan Hakları Derneği(ALDHU)'nin yönetim kurulu üyesi ve Sosyalist Enternasyonal'in Onursal Başkanı'dır.