At international level, he features for San Marino U21. His main role on the pitch is Defender. His stronger foot is Right. His estimated market valuation currently stands at 75K €.

His latest transfer saw him join Tre Fiori from San Marino Academy U22 via on 2025-07-01.

Across the San Marino Campionato di Calcio 2025-2026, Mattia Sancisi appeared in 22 matches and averaged 0 tackles, 0 interceptions, 0 clearances, and 0 blocked shots per game.