Vincent Olivier Sierro (born 8 October 1995) is a Swiss professional footballer who plays as a midfielder for Ligue 1 club Toulouse, whom he captains, and the Switzerland national team.

[3] His father having played for Sierre and the Valais regional squad, and his grandfather amongst the founders of FC Crans-Montana, Sierro grew up in a footballing family.

Sierro began his senior career in the Swiss third division with the FC Sion B team during the 2013–2014 season.

[9] On 26 March, Siero debuted in a friendly match against the Republic of Ireland,[10] playing 65 minutes alongside captain Granit Xhaka in midfield before being replaced for Denis Zakaria.

[13] In said tournament on 15 June, Sierro appeared as an 86th-minute substitute for Remo Freuler in Switzerland's opening Group A fixture against Hungary.