Sandro Theler

Sandro Theler (born 15 December 2000) is a Swiss professional football player who plays as a defender for Swiss Challenge League club Aarau.

Early life and youth career
Born in Brig-Glis, Switzerland, Theler began his career from the youth team of FC Sion, where he had featured for the clubs' under-21 division from 2016 to 2019.

2019–20
Theler signed his first senior contract with the Swiss top-tier club FC Sion on 2019. He would represent for the club in the 2019-20 Swiss Super League season. Theler played his debut match for the club against FC Basel on 28 June 2020 as a substitute for Dimitri Cavaré on the 50th minute of the game, which ended 2–0 to Basel. Theler scored his debut goal for the club in his last match of the season against FC Luzern on 22 July 2020 in the 31st minute of the game. The match ended 1–2 to Sion.

2020–21
Theler stayed with the club for the 2020-21 Swiss Super League season. Theler played his first match of the season against defending champions BSC Young Boys on 26 September 2020 as a substitute on the stoppage time for Dennis Iapichino. The match ended on a 0–0 draw. Theler played his Swiss Cup debut against FC Schötz on 12 September 2020 as a substitute for Batata in the stoppage time of the game which ended 0–3 to Sion.

Aarau
On 1 February 2024, Theler signed with Aarau until the end of the 2023–24 season.