Portuguese Security Intelligence Service Headquarters

The new SIS headquarters at the Ameixoeira Fort, Lisbon. The new headquarters are equipped with with state-of-the-art technology, bunkers, and shielded rooms (Tempest Shielding Technology).

The Serviço de Informações de Segurança (SIS, Security Intelligence Service) is the Portuguese Intelligence and Secret Service agency founded in 1984. The function of SIS is to guarantee the internal security and prevent sabotage, terrorism, espionage and the practice of acts which, by their nature, can change or destroy the Rule of Law as constitutionally established.