BSC Young Boys has announced that 17-year-old defender Olivier Mambwa will play this season on loan at FC Thun. FC Thun does not have an option for a permanent transfer. BSC Young Boys is planning long-term with Mambwa and has extended his contract early until 2028. Last season, he played seven Super League matches.

According to 4-4-2.com, Young Boys have extended the contract of 17-year-old Swiss left-back Olivier Mambwa until 2029. Mambwa will play the current season on loan at league competitor FC Thun, and the deal does not include a purchase option. He has been capped three times for the Switzerland U19 national team. His current market value is estimated by Transfermarkt to be €1.00m.