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PT Krakatau Engineering is an engineering, procurement, and construction (EPC) contractor that provides solutions in the sector of industry and infrastructure. It is based in Cilegon, Indonesia, and has subsidiaries and affiliated experience with international partners. PT Krakatau Engineering has expertise in handling facilities, power plants, industry plants, material handling, mining and industrial plants, chemical plants, steel plants, civil and building, and infrastructure. The Indonesian company was founded in 1988 and is ultimately controlled by the Government of Indonesia. The CEO of the company is Ahmad Hafidz Saubari.

PT Widya Sapta Colas, also known as Wasco, is a joint venture company based in Jakarta, Indonesia that specializes in road construction development and maintenance services. One of their notable projects is the Matak Airport, which serves charter and commercial flights to and from Tanjung Pinang and Batam. Founded in 1996, the Indonesian company has worked on various projects, including the construction of runways and aprons for airfields, port and container grounds, toll road projects, and maintenance works for several coal mine haul roads.

PT Wijaya Karya Realty engages in real estate development, property management, and construction services. It operates through real estate, property service, construction, and hotel segments. The company was founded on January 20, 2000 and is headquartered in Jakarta, Indonesia.

Part of PT Wijaya Karya (Persero) Tbk, PT Wijaya Karya Bitumen is an Indonesian company that engages in asphalt production activities. The company is based in Buton, Indonesia. PT Wijaya Karya Bitumen was acquired by PT Timah Tbk on April 05, 2005.

PT Wijaya Karya Realty engages in real estate development, property management, and construction services. It operates through real estate, property service, construction, and hotel segments. The company was founded on January 20, 2000 and is headquartered in Jakarta, Indonesia.

PT WIKA Gedung provides construction services. It serves the government, SOEs (regional or local governments), loan and private sectors throughout Indonesia. The firm operates as partner in construction, investment, concession and property. The company was founded on October 24, 2008 and is headquartered in Jakarta, Indonesia.

Part of Peninsula Bay, Inc., PT Sinarwijaya Ekapratista is an Indonesian company that invests and develops real estate. The company is based in Jakarta, Indonesia.