Giorgios Retsinas

Gulf Helicopters Co. QSC provides commercial aviation services. It offers emergency medical services, vip executive transport, load lifting, seismic support, onshore transport, tourist flights, aerial photo flights and banner Flying. The company was founded in 1970 and is headquartered in Doha, Qatar.

Al-Shaheen Energy Services Ltd. engages in the provision of oilfield services. Its activities include inspection, testing, tubular running, wireline services, and repair and maintenance for equipment. The company was founded in 2006 and is headquartered in Doha, Qatar.

Gulf Drilling International Ltd. Q.S.C. provides oil and gas extraction services. It also offers onshore and offshore rigs, accommodation jackups and lift boats. The company was founded in May 2004 and is headquartered in Doha, Qatar.

QatarEnergy Corp. provides oil and gas drilling, exploration, refining, and distribution services. It offers cover exploration, drilling and production operations, transport, storage, marketing, and sale of crude oil natural gas liquids, liquefied natural gas, gas to liquids, refined products, petrochemicals and fertilizers, and helicopter and financials services. The company was founded in 1974 and is headquartered in Doha, Qatar.

Al Shaheen Holding QSC produces and distributes oil and gas. Its portfolio companies operates in the different sectors that include Well Services, Pipeline Intelligent Pigging and Pipeline Integrity Solutions, and GE Fleet Repair and Field Services. The company was founded in 2006 and is headquartered in Doha, Qatar.

Nakilat, Inc. provides transmission and storage of natural gas. It offers critical transportation link in the state of Qatar's liquefied natural gas supply chain. The company was founded in 2004 and is headquartered in Doha, Qatar.

Part of Qatar Fuel-Woqod QSC, WOQOD Marine Services Co. WLL is a Qatari company that provides marine transportation services. The company is based in Doha, Qatar. Saad Rashid Al-Mohannadi has been the CEO of the company since 2017.

Part of Cosmo Energy Holdings Co., Ltd., Qatar Petroleum Development Co. Ltd. (Japan) is a Japanese company that explores and develops crude oil. The company is based in Tokyo, Japan. The company was founded in 1997. Qatar Petroleum Development Co. Ltd. (Japan was acquired by Cosmo Oil KK from Japan National Oil Corp. on March 14, 2005 for $5.48 million.