Institutional Security Bureau
| Portuguese: Gabinete de Segurança Institucional | |
| Bureau overview | |
|---|---|
| Formed | 1 November 1930 | 
| Type | Ministry | 
| Jurisdiction | Federal government of Brazil | 
| Headquarters | Planalto Palace, Praça dos Três Poderes Brasília, Federal District | 
| Annual budget | $2.29 b BRL (2023) | 
| Bureau executives | 
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| Parent Bureau | Presidency of the Republic | 
| Website | www | 
The Institutional Security Bureau (Portuguese: Gabinete de Segurança Institucional da Presidência da República, GSI; English: Institutional Security Bureau of the Presidency of the Republic, ISB) is an executive cabinet office of the federal government of Brazil responsible for providing direct assistance at a moment's notice to the President on matters of national security and defense policy. It is currently headed by retired general Marcos Antonio Amaro dos Santos.