Martin H. Eden

CNOOC Petroleum North America ULC is an upstream oil and gas company responsibly developing energy resources in the UK North Sea, offshore West Africa, the United States, and Western Canada. The firm has three principal businesses: conventional oil and gas, oil sans, and gas and oil. The company was founded in 1971 and is headquartered in Calgary, Canada.

Assure Energy, Inc. acquires, explores, and develops oil and gas properties. The company is headquartered in Calgary, Canada.

Madalena Petroleum Ltd. extracts crude petroleum and natural gas. The company was founded in November 9, 2004 and is headquartered in Calgary, Canada.

Artumas Group, Inc. explores and produces oil and gas. The company operates four business segments; Gas Operational, Midstream, Power and T&D Segments. The gas operational segment explores and develops oil and natural gas in Tanzania an Mozambique. The Midstream Segment processes, transports and produces oil and natural gas in Tanzania. The Power Segment generates electricity in Mtwara town in southeast Tanzania. The T&D Segment includes the rehabilitation and expansion of certain electricity transmission and distribution assets in southeast Tanzania. The company was founded on August 8, 2000 and is headquartered in Calgary, Canada.

Gran Tierra Exchangeco Inc. engages in the exploration and production of oil and gas properties. It holds interests in producing and prospective properties in Colombia, Argentina and Peru. The company was founded on Jul 25, 2008 and is headquartered in Calgary, Canada.

The Institute of Chartered Accountants in England & Wales ensures that its members, students, and affiliates maintain the highest standards of professional competency and conduct to protect the public interest. The non-profit company is based in London, UK, and has subsidiaries in the United Kingdom. With over 150,000 members, the institute provides technical information, helplines, and communities to its members.