He was also an instructor at the Brazilian Army Mission in Paraguay and commanded the 9th Construction Engineering Battalion Cuiabá.

Later was Chief of Staff of the 2nd Construction Engineer Brigade and of the 12th Military Region, both situated in Manaus.

Peri was previously a Cabinet Chief of the Army General Secretary in Brasília.

In this rank he was 2nd Military Region commander (São Paulo) and deputy chief of the Engineering and Constructions Department in Brasília.

In March 2003, Peri was promoted to General-de-Exército (English: General), the highest rank he has ever held.