David Thomas

Centurion Energy International, Inc. explores and produces oil and natural gas. The company was founded by Said Youssefa Arrata and Barry Swan on May 20, 1997 and is headquartered in Calgary, Canada.

Afren Plc engages in the business of oil and gas exploration, development and production in Africa and the Kurdistan region of Iraq. The company was founded by Ethelbert Julius Llewellyn Cooper, Egbert Ulogo Imomoh, Constantine Ogunbiyi, and Osman Shahenshah on December 3, 2004 and is headquartered in Manchester, the United Kingdom.

RioTech Pharmaceuticals Ltd. develops novel therapeutic drugs for hepatitis C virus. The company was founded on Nov 5, 2001 by Graham Foster, Adrian V. S. Hill, Peter Karayiannis, Howard David Thomas and Mark R. Thursz and is headquartered in Horsham, the United Kingdom.

Melrose Resources Plc is an exploration company, which develops and produces oil and gas with core assets in North Africa and Eastern Europe. It maintains a balanced portfolio of production, development and exploration assets in stable and low cost environments. The company has its operations mainly in Egypt, Bulgaria, Romania and France. Melrose holds interests in four concessions in Egypt; Mansoura, South East Mansoura, Qantara and Mesaha. It also conducting exploration programme in the under explored central area of the Galata block. Melrose Resources was founded in 1992 by Robert F M Adair and is headquartered in Edinburgh, the United kingdom.

Petroceltic International Ltd. engages in the exploration and production of oil and gas resources. The firm operates its business in Algeria, Egypt, Black Sea, and Kurdistan regions. The company was founded on May 16, 1984 and is headquartered in Dublin, Ireland.