Before he served as Vice President and Congressman, Giampietri was a Lima City Councilman from 1999 to 2002, elected under the Fujimorist Vamos Vecino, close to then-President Alberto Fujimori.

Giampietri was one of the naval officers implicated in the massacre on El Frontón, a prison island off the coast of Callao.

He attended the Colegio de la Inmaculada and the San José Maristas schools in Lima and Callao, respectively.

On 28 July of the same year, he was sworn in before the Congress of the Republic for the period 2006–2011 together with Lourdes Mendoza del Solar, who was the 2nd Vice President.

[5] Giampietri was one of the naval officers implicated in the massacre on El Frontón, a prison island off the coast of Callao.