The company has worked for and in joint venture with:
- HITACHI, Japan
- FUJI ELECTRIC, Japan
- MARUBENI, Japan
- AIR LIQUIDE, France
- MITSUBISHI, Japan
- TOMEN CORPORATION, Japan
- HYUNDAI, Korea
- CIMIMONTUBI, Italy
- HOLECPROJECT & ELIN
- HOLEC, Netherland
- NISSIN ELECTRICAL, Japan
- SCHNEIDER, France
- ABB, Sweden/Germany
- TOYO ENGINEERING, Japan
- DANIELI, Italy
- ISPATINTERNATIONAL, UK
- SIEMENS, Germany
- TAYO, Japan
- OKURA, Japan
- SUNDBRISTA, Sweden
- QUEST PIPELINES, India
- HOFINCONSGROUP, India
- ALGHANDI, Dubai UEA
- DAESUN, Korea
From 1994 onward the company started executing turnkey projects. Notable amongs them being are:
- 150 kV Gas Insulated Substation (GIS) at Bangil - Pasuruan for PT. PLN (Persero), East Java.
- 150 kV Gas Insulated Substation (GIS) at Karawang for PT. PLN (Persero), Banten.
- 150 kv Substation (Conventional) at Cilegon for Air Liquide (France), Banten.
- 2 nos Conventional Substation at Alindo Substation and Cilegon Substation for PT. PLN (Persero), Banten.
- Construction of 46 nos medium voltage network in Kabupaten Tegal and Brebes, Central Java.
- Turnkey for electrical works for Okura (Japan) and PT. Panca Persada for 75th Rolling Mills, Jakarta.
- 70 kV Conventional Substation turnkey project and procurement installation of 70 kV transmission system at Talise, Palu - South Sulawesi.
- Relocation of 3 nos 150 kV and 4 nos 70 kV transmission lines tower at Cibitung, West Java.
- 150 kV Conventional Kuala Kapuas Substation at Balikpapan - East Kalimantan.
- Public lighting at Kabupaten Sidoarjo, East Java.