Harvesting an abundance of oil and natural gas resources, the Middle East supplies nearly half of all exports to the global oil market. Middle Eastern countries Iran, Iraq, Kuwait, Qatar, Saudi Arabia and the United Arab Emirates are all members of the Organization of the Petroleum Exporting Countries (OPEC), which pumps roughly 40% of the world's oil, with Saudi Arabia leading the pack for the greatest amount of output. OPEC's crude oil production was 28.7 million barrels per day in the first half of 2009.
Refinery staff consists of a wide variety of positions within the petroleum refining industry. Most workers use special and automated equipment as refineries are highly automated. They often start as assistants of senior workers and work on rotating shifts. General refinery specialties include pipe fitters, boiler makers, electricians, maintenance technicians, refinery operators, and engineers.