During his tenure as the Buntong MLA, he was involved in multiple political defections and party switchings.
[1] In March 2020, Tronoh MLA Paul Yong Choo Kiong and Sivasubramaniam were removed from DAP as they defected and supported the opposing PN.
In March 2021, Sivasubramaniam left GERAKAN and joined BERSATU as party associate members.
In September 2022, they left PBM and rejoined BERSATU as associate members again with former Bercham MLA Sum Cheok Leng.
He was not reelected as the Buntong MLA after losing to Thulsi Thivani Manogaran of PH by a minority of 19,155 votes in a landslide defeat.