He currently plays for Universidad San Martin, wearing the number 32 shirt. He plays primarily as a Forward. His current market value is estimated at 125K €.

His most recent move was a from Universidad San Martín de Porres II to Dep.San Martin on 2023-01-01.

In the Peruvian Liga 2 2025 season, Sebastian cornejo scored 0 goals and provided 0 assists across 17 appearances, averaging 0 goals per game with 0 shots attempted and 0 on target.