Dylan Bronn was born on 19 June 1995 in Cannes, France, to Tunisian heritage. He came through Cannes' youth ranks before signing with Niort in 2016. After three seasons in France's Ligue 2, he moved to KAA Gent in Belgium in 2017 for around €1 million. After three Belgian Pro League seasons, he moved to Metz in January 2020 for around €4.5 million.
In summer 2022 Salernitana signed Bronn for around €1 million. His Italian career was eventful: 4 Serie A appearances in 2023 before a January 2024 loan to Servette FC in Switzerland's Super League, where he won the Schweizer Pokal in 2023–24. After returning briefly to Salernitana for the Serie B season, he moved permanently to Servette FC on a free transfer in July 2025.
His 2025–26 Servette season has been productive: 14 Swiss Super League appearances with an assist, 2 UEFA Champions League matches and a UEFA Europa Conference League appearance, plus the Tunisian national team commitments.
For Tunisia, Bronn played 4 matches at the 2025 Africa Cup of Nations. A two-footed centre-back with the technical security to play out from defence and the leadership of a senior squad member, he is one of Tunisia's most experienced centre-backs heading into the 2026 FIFA World Cup, alongside Yassine Meriah and Mohamed Ali Ben Romdhane.