Karthiges or Karthi has been an activist since his youth days, leading the campaign for free education in the party youth wing. He is an active organizer and handles many cases in the north covering Penang, Kedah and north Perak. Karthi who is also the coordinator for PSM National housing Bureau, has vast experience organizing estate workers and urban pioneer villages threatened with evictions by developers and state authorities. Currently he is a full time activist and is also pursuing his Masters in USM, Penang.
Karthi is also the key coordinator for the PSM Bagan Serai branch, comprising mainly of estate workers in that locality .