Matthew Guillaumier (Maltese pronunciation: [ˈɡul:ɐjmɪ:r], born 9 April 1998) is a Maltese professional footballer who plays as a midfielder for Polish club Stal Mielec and the Malta national team.
On 26 April 2013, he made his debut for the senior team in a First Division match against Gudja United, aged only 15 years and 17 days.
[9] On 31 January 2022, Guillaumier joined Siena in the Italian third-tier Serie C on loan with an option to buy.
[10] On 13 July 2023, Polish Ekstraklasa side Stal Mielec announced the signing of Guillaumier on a two-year deal, with an option for another season.
[11] Guillaumier was included in the squad of hosts Malta for the 2014 UEFA European Under-17 Championship.