Guillaume Jannez is a professional footballer from FRA and is currently 38 years old. He is on the books of Concarneau and wears shirt number 4. His main role on the pitch is Defender. He measures 196cm in height and weighs 85kg. His stronger foot is Right. His estimated market valuation currently stands at 75K €.

His latest transfer saw him join Concarneau from FC Quimperlé via on 2007-07-01.

Across the French Championnat National 2025-2026, Guillaume Jannez appeared in 20 matches and averaged 1.2 tackles, 1.1 interceptions, 5.6 clearances, and 0.1 blocked shots per game.