- PT. Paiton Indonesia / Shinwha Engineering & Toyo Engineering.
- PT. Pakuwon Indah / SK. Engineering.
- PT. PLN / LG. Engineering.
- PT. Hanil Adetex / PT. Hanil Indonesia ( Solo Factory ).
- PT. Hanil Jaya Metal Work.
- PT. Cheil Samsung Indonesia ( Jombang Factory ).
- PT. Puspetindo / SK. Engineering
- PT. Indokemika Jayatama
- etc.