[2] On March 20, 1941 he entered the foreign service and on July 16, 1941 he became Vice Consul in Mexico City, where on November 1, 1941 he was promoted to Embassy Secretary 3rd Class.
On March 2, 1959, during Hernán Siles Zuazo's second term, Time magazine quoted that Bolivia and the headache it caused were best shared among neighboring countries.
In August 1976, Siracusa refused to transmit a demarche against plans, subversives, politicians and celebrities to the rulers in Montevideo and asked for instructions.
On August 30, 1976, the Assistant Secretary of State Harry W. Shlaudeman wrote a memorandum to Operation Condor and proposed to negotiate with Secretary of State Juan Carlos Blanco Estradé and General Julio César Vadora (1974-1978).
In a telegram from Lusaka on September 16, 1976, Henry Kissinger instructed Shlaudeman to stop pursuing the efforts.