Born in Odense in July 2000, Hermansen joined local club Næsby Boldklub as a schoolboy, before moving to Copenhagen-based Brøndby’s Academy at the age of 15 in 2015.
Hermansen made his senior Brøndby debut in 2020 before becoming first-team starter under the guidance of coach Ankergren in 2021/22. He was rewarded with the club’s Player of the Year Award in 2022 and made 70 appearances across two-plus seasons, including eleven in UEFA competitions.
In summer 2023, Hermansen transferred to Leicester and immediately made his mark, keeping 13 clean sheets and conceding just 41 goals in 44 appearances as the Foxes won the EFL Championship title. His performances won him a place in the 2023/24 Championship Team of the Season alongside new West Ham teammates Kyle Walker-Peters and Crysencio Summerville, who were then with Southampton and Leeds United respectively.
Despite Leicester’s struggles in the Premier League in 2024/25, Hermansen caught the eye, making numerous saves, including seven in a miraculous home win over West Ham in December 2024.
At international level, Hermansen has been capped by Denmark at every age-group level from U16s to U21s, earning 28 caps in total and traveling to the UEFA European U21 Championship finals in 2021. He earned a first senior callup in 2023 and has been named in a dozen squads by Denmark managers Kasper Hjulmand, who took him to UEFA Euro 2024, Lars Knudsen and Brian Riemer.
Hermansen becomes West Ham’s fifth permanent summer signing following the arrivals of Jean-Clair Todibo, El Hadji Malick Diouf, Kyle Walker-Peters and Callum Wilson.
Everyone at West Ham United would like to welcome Mads to London Stadium and wish him every success for his career in Claret and Blue.