He currently plays for Olympic Charleroi, wearing the number 38 shirt. He plays primarily as a Midfield. His current market value is estimated at 200K €.

His most recent move was a Loan from Farciennes to RAAL La Louvière on 2026-06-30.

Across 20 appearances in the Belgian Second Division 2025-2026, Thierno Diallo registered 0 goals and 0 assists, while completing 1 key passes out of 227 total passes with a passing accuracy of 9.1.