Under Eduardo Leite governorship, Vieira also was nominated State Secretary of Public Security.

[2] After Leite's resignation in March 2022, Vieira became the Governor of Rio Grande do Sul.

He headed the State Department of Criminal Investigations (DEIC) for 6 years, he was Municipal Secretary of Security of Canoas, head of the Civil Police during Tarso Genro governorship and ran for State Deputy in 2014, unsuccessfully.

[4] In July 2017, he was announced as pre-candidate for Governor of Rio Grande do Sul for the Brazilian Labour Party (PTB).

Upset with homophobic speeches made by the PTB national president, Roberto Jefferson, towards Leite, Vieira Júnior moved to PSDB.