He currently plays for Atenas, wearing the number 6 shirt. He plays primarily as a Defender. He stands at 183cm tall and weighs 80kg. His preferred foot is Left.

His most recent move was a from Deportivo Madryn to Atenas on 2026-01-17.

Throughout the ARG Primera Nacional 2025, M. Mansilla featured in 23 matches, averaging 0 tackles, 0 interceptions, and 0 clearances per game, while blocking 0 shots per game.