Career
Sergio took over the role of Nathan Azarcon when the latter left the band in March 2001. Known to many as Japs, Japsuki, and Justice of the Peace, is actually a drummer. Furthermore, he is also one of the founders of the band Daydream Cycle and is the guitarist and co-songwriter of the said band.
He went on hiatus some time in 2011 in Rivermaya as he was focusing with Daydream Cycle.
On December 19 2011, Sergio released his project solo album titled "Monologue Whispers". On November 2012, Sergio posted on his official Facebook page that he is no longer with Rivermaya.
Now he is the frontman of the band Peso Movement.