PT Saptaindra Sejati (SIS) is one of Indonesia’s leading mining contractors, specializing in coal mining services. As a subsidiary of PT Alamtri Resources Indonesia Tbk (formerly known as PT Adaro Energy Indonesia Tbk), SIS plays a crucial role in supporting Adaro’s mining operations by providing a broad range of services, including contract mining, civil works, infrastructure development, and land logistics. Over the years, SIS has developed a strong reputation for its expertise, efficiency, and commitment to safety in the mining industry.
SIS was established to meet the growing demand for reliable mining services in Indonesia. With its headquarters in Jakarta, the company operates across various mining sites throughout the country. SIS has continuously expanded its operations, investing in advanced technologies, modern equipment, and workforce training to ensure optimal efficiency in coal extraction. Through strategic planning and engineering solutions, SIS has contributed significantly to Indonesia’s coal industry, ensuring the smooth transportation and production of coal for domestic and international markets.

PT Bank Tabungan Negara (Persero) Tbk, commonly known as Bank BTN, is one of Indonesia’s oldest and most prominent financial institutions. Established in 1897 under the name Postspaarbank during the Dutch colonial era, the bank initially served as a savings institution for postal services. Following Indonesia’s independence, the bank was nationalized in 1950 and renamed Bank Tabungan Negara. Over the decades, Bank BTN has evolved into a full-service commercial bank with a strong focus on housing finance, playing a pivotal role in supporting the government’s housing development programs.

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Bank Rakyat Indonesia, commonly known as BRI, is one of the oldest and largest banks in Indonesia. Established in Purwokerto, Central Java on December 16, 1895 by Raden Bei Aria Wirjaatmadja, BRI began as a small institution providing financial services to the local elite. Over time, it grew into a vital player in Indonesia’s banking system, particularly known for its strong commitment to supporting microfinance and rural development.
After Indonesia’s independence, BRI was designated as the first government-owned bank under a regulation passed in 1946. This solidified its role in the country’s economic growth and national development. In the 1990s, BRI transitioned into a limited liability company, and by 2003 it had become a publicly traded entity, with the Indonesian government maintaining majority ownership.

Bank Mandiri Taspen, also known as Bank Mantap, is a subsidiary of Bank Mandiri that provides banking services specifically for retired civil servants (PNS) and military personnel (TNI / Polri). Established on February 23, 1970, as Bank Pasar Sinar Harapan Bali, it has undergone several transformations over the years. Initially a cooperative, it became a limited liability company (PT) on November 3, 1992, and later transformed into a full-fledged bank.
In 2008, Bank Mandiri acquired Bank Sinar Harapan Bali, leading to a restructuring process that involved Bank Mandiri, PT Taspen, and PT Pos Indonesia. This restructuring resulted in the renaming of the bank to PT Bank Mandiri Taspen Pos on August 7, 2015, and later to PT Bank Mandiri Taspen on October 9, 2017.
Bank Mandiri Taspen offers a variety of financial products and services tailored to the needs of its target customers, including savings accounts, deposits, loans, gold pawn services, and bill payment platforms. The bank is committed to supporting the financial well-being of retired civil servants and military personnel, helping them maintain a stable income even after retirement.

PT Angkasa Pura Suport (APS) is a subsidiary of PT Angkasa Pura I (Persero) (Now, PT Angkasa Pura Indonesia / InJourney Airports), established in March 2012 to provide comprehensive and integrated property maintenance services, particularly for airport facilities. The company was founded with the vision of supporting the parent company in delivering world-class services to passengers and visitors at airports across Indonesia. APS has since evolved into a key player in the aviation support industry, offering a wide range of services that extend beyond airport operations to include commercial and public properties such as hospitals and office buildings.

PT Pertamina Training & Consulting (PTC) is a subsidiary of PT Pertamina (Persero), Indonesia’s state-owned oil and gas company. Established in 1999 under the name PT Patra Tridaya, the company officially began its operations in 2002. PTC was formed to support Pertamina’s strategic objectives in human resource development and operational excellence. Over the years, PTC has evolved into a multifaceted service provider offering a wide range of solutions in training, consulting, manpower supply, security services, event management, and competency assessment. Its role within the Pertamina Group is to ensure that the workforce and organizational systems are aligned with global standards and capable of supporting the dynamic needs of the energy sector.

Husky-CNOOC Madura Limited (HCML) is a key player in Indonesia’s upstream oil and gas industry. Operating under a Production Sharing Contract (PSC) with the Indonesian government, HCML is a joint venture between Husky Oil Madura Partnership (40%), China National Offshore Oil Corporation Southeast Asia Limited (40%), and SMS Development Ltd. (20%). The company’s mission is to responsibly explore and produce hydrocarbons in the Madura Strait, contributing to national energy security and regional development.
HCML’s origins date back to 1982, with the formation of Husky Oil Madura Limited. In 2011, following a strategic partnership with CNOOC, the company was restructured and rebranded as HCML. Since then, it has focused on developing offshore gas fields, with the BD Field being its flagship project. Located approximately 65 kilometers east of Surabaya and 16 kilometers south of Madura Island, the BD Field contains significant reserves of natural gas and condensate. Its development has been instrumental in supplying clean energy to East Java and beyond.