Overseas – South East Asia/ ASEAN Region
- National Power Supply Public Co Ltd, Prachinburi, Thailand
- PT CEG Resources, Jakarta, Indonesia
- San Miguel Corporation, Manila Philippines
- LCS Optiroc Pte Ltd, Singapore
Malaysia
- Hicom Power Sdn Bhd, Rangkai Positif Sdn Bhd; Teknik Janakuasa Sdn Bhd; Tanjung Bin O&M Sdn Bhd
- Jimah Energy Ventures Sdn Bhd, Jimah O&M Sdn Bhd, Edra Power Holdings Sdn Bhd
- TNB JanaManjung Sdn Bhd (Via TNB Remaco)
- Kapar Energy Ventures Sdn Bhd
- Intergrax Berhad
- LEKIR Bulk Terminal Sdn Bhd
- LHOIST (Malaysia) Sdn Bhd
- IHI Power System (M) Sdn Bhd (IPSM)
- Mutiara Etnik Sdn Bhd
- YTL Power Services Sdn Bhd
- EastLog Project Services Sdn Bhd
- Dakota Integrated Services Sdn Bhd
- Domestic Maju Sdn Bhd