Firdaus returned to Tampines Rovers for the 2011, 2012 S.League and 2013 S.League season after joining Home United in 2011 and LionsXII in 2012.

In December 2011, the FAS announced that Firdaus was to join the newly formed LionsXII for the 2012 Malaysia Super League.

After LionsXII was disbanded, Firdaus signed for Young Lions in 2016, although he was overaged together with Khairul Amri.

Firdaus signed for Geylang International in 2019,[1] and left at the end of the 2021 Singapore Premier League season.

Firdaus once again returned to Tampines Rovers for the 2022 Singapore Premier League season, following the end of his contract at Geylang International.