[5][6][7] In late 2015, when the decision was made by the Football Association of Malaysia to kick the LionsXII out of the Malaysian Super League, Izwan, along with former teammates Christopher van Huizen, Izzdin Shafiq, Hafiz Sujad and Firdaus Kasman linked up with former coach V. Sundramoorthy at Tampines Rovers.

[8] After spending two years with Tampines Rovers, Izwan signed for Nongbua Pitchaya on 14 December 2017, becoming the second Singaporean to play in the Thai League 2, alongside compatriot and fellow goalkeeper, Hassan Sunny, who joined Army United for a second stint.

[12] On 27 June 2021, Izwan return to his home country after a long stint in Thailand by signing for the Singapore Premier League side Hougang United for the remainder of the 2021 season.

Izwan couldn't preserve a point for his side against Albirex at home after conceding a lobbed goal by Takahiro Tezuka and ultimately lost to the title holders.

[10] On 16 June 2015, Izwan made 18 saves as Singapore managed keep a clean sheet against Asian giants, Japan to a 0–0 draw in Saitama during a 2018 FIFA World Cup qualifier match.

[10] On 12 June 2021, Izwan played managed to hold 3-time AFC Asian Cup winners, Saudi Arabia from scoring until the 83rd minute where Salem Al-Dawsari broke the deadlock.