Brea embarked on his senior career with Sarmiento, after signing with the club in 2016 following a fourteen-year stint with Atlético Charlone.[2] He made the breakthrough during the 2017–18 season, initially as an unused substitute against Nueva Chicago in November 2017 prior to making his debut in a 1–0 win over Aldosivi on 24 March 2018.[1][3] A second appearance against All Boys followed a week later, in a season which the team ended in fifth place.[1][4]