Guillaume Jannez is a 38-year-old professional football player from FRA. He currently plays for Concarneau, wearing the number 4 shirt. He plays primarily as a Defender. He stands at 196cm tall and weighs 85kg. His current market value is estimated at 100K €.

His most recent move was a from FC Quimperlé to Concarneau on 2007-07-01.

Throughout the French Championnat National 2025-2026, Guillaume Jannez featured in 20 matches, averaging 1.2 tackles, 1.1 interceptions, and 5.6 clearances per game, while blocking 0.1 shots per game.