About Us

PT Sinergi Inti Industri ( SII )

was established in 2011, we produce counterweights for hydraulic excavators and shovels as our main and routine product. We also produce other quality welding work such as building steel construction, buoy, bucket, grapple, oil company supporting equipment, automotive industry rack/pallet, painting service and others.

We already got the BGPP (Benchmarking Guide Paint Process) and BGWF (Benchmarking Guide Welding and Fabrication) certifications from Caterpillar Indonesia. Achieved ISO9001-2015 certification in 2019 Recertification November 2025