Alejo Mainero is a 25-year-old professional football player from ARG. He currently plays for Atenas, wearing the number 9 shirt. He plays primarily as a Forward. His preferred foot is Left. His current market value is estimated at 10K .

His most recent move was a from to Atenas on 2026-01-19.

In the ARG Primera Nacional 2024 season, Alejo Mainero scored 0 goals and provided 0 assists across 6 appearances, averaging 0 goals per game with 0 shots attempted and 0 on target.