Halliburton

Halliburton Company is an American multinational corporation responsible for most of the world's hydraulic fracturing operations. In 2009, it was the world's second largest oil field service company. It employs approximately 55,000 people through its hundreds of subsidiaries, affiliates, branches, brands, and divisions in more than 70 countries. The company, though incorporated in the United States, has dual headquarters located in Houston and in Dubai.