Power Plant construction has been the major strength of SSP for many years. The State Electricity Company (PLN) has awarded many direct contracts to SSP. Various contracts have also been awarded to SSP by many International contractors such as Black & Veatch International, Mitsubishi Heavy Industry, Samsung Heavy Industry, Toa Corporation, Shinwha, ABB, Siemens AG, MES-Iadecco, Chengda, Zelan, Harbin, China National Electric Equipment Corporation and others.

The company had the major role in the Construction of such as :

• Paiton Power Plant
• Paiton Private Power Plant I & II
• Suralaya 5, 6 & 7 Steam Power Plant
• Muara Karang Combined Cycle Power Plant
• Tambak Lorok Combined Cycle Power Plant
• Gresik 42 MW Combined Cycle Power Plant
• 2x300 MW Cilacap Power Plant
• 2x300 MW PLTU Banten–Labuhan
• 3x330 MW PLTU I Jawa Barat Indramayu
• 1x600–7700 MW PLTU II Jawa Timur–Harbin
• Indralaya Combined cycle Power Plant
• 2x660 MW Tanjung Jati B Unit 3 & 4
• PT Cahaya Fajar Kaltim at Tanjung Batu Tenggarong
• Tanjung Priok Gas Power Plant
• 2x300–400 MW PLTU II Jawa Tengah, Rembang
• etc.

SSP had also successfully constructed many Chimneys Projects such as :

• Cilacap Power Plant
• Indramayu Power Plant
• Labuan Power Plant
• 2x300–400 MW PLTU II Rembang
• Chimney construction 2x660 MW Tanjung Jati B Unit 3 & 4
• On going Chimney construction on PLTU Lontar and PLTU Batang