He currently plays for Quilmes, wearing the number 4 shirt. He plays primarily as a Defender. His current market value is estimated at 175K €.

His most recent move was a from Ferrol Carril Oeste to Quilmes on 2026-01-20.

Throughout the ARG Primera Nacional 2026, Martin Vallejos featured in 3 matches, averaging 0 tackles, 0 interceptions, and 0 clearances per game, while blocking 0 shots per game.