Trijono

PT Pertamina (Persero) engages in the exploration and production of oil and gas, in both upstream and downstream sectors. It operates through the following segments: Upstream, Refinery and Petrochemical, Commercial and Trading, Gas, Power and New & Renewable Energy, Integrated Marine Logistics, Financial and Services, and Holding. The company was founded on December 10, 1957 and is headquartered in Jakarta, Indonesia.

The Indonesian Petroleum Association is a company based in Jakarta, Indonesia. The private company's description is "-.

PT Pertamina EP engages in the oil and gas exploration and production services. The company was founded on September 13, 2005 and is headquartered in Jakarta, Indonesia.

PT Pertamina Hulu Energi manages 57 operational and operational portfolios of 59 subsidiaries, 8 joint ventures, and 2 affiliated companies which manage oil and gas blocks in Indonesia and abroad, and engages in downstream oil and gas business and services. The company was founded on January 1, 2008 and is headquartered in Jakarta, Indonesia.

PT Pertamina Gas engages in the midstream sector and downstream of gas industry in Indonesia. It offers gas transportation, gas trading, gas processing, oil transportation, and LNG regasification. The company was founded on February 23, 2007 and is headquartered in Jakarta, Indonesia.

PT Wijaya Karya Rekayasa Konstruksi, also known as Wika Rekon, is a construction and engineering company based in Jakarta Timur, Indonesia. The Indonesian company provides construction services, engineering procurement and construction services, fabrication services, operation and maintenance services, and investments. Wika Rekon aims to become an integrated and leading total solution company in the energy sector. Wika Rekon is a subsidiary of PT Wijaya Karya (Persero) Tbk and ultimately controlled by the Government of Indonesia. The company was founded in 2008, and Hendra Jayusman has been the CEO since 2018.

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.