Umberto Lourenço Louzer Filho (born 24 February 1980) is a Brazilian football coach and former player who played as a defensive midfielder.

Louzer began his managerial career with his first club Paulista's youth setup in 2016, being promoted to assistant of the first team in the following year.

[5] On 19 April, after leading the club to a Campeonato Paulista Série A2 title, he renewed his contract for a further year.

[6] Louzer was sacked on 13 November 2018, and was subsequently in charge of Vila Nova[7] and Coritiba[8] during the 2019 season.

[14] On 22 June, he replaced Eduardo Baptista at the helm of fellow top tier side Juventude,[15] but was himself dismissed on 3 October.