| Name | Title | Contact Details |
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valvtect@valvtect.com
Marshall W Nelson and Associates Inc is a Milwaukee, WI-based company in the Energy and Utilities sector.
CGG is a fully integrated Geoscience company providing leading geological, geophysical and reservoir capabilities to its broad base of customers primarily from the global oil and gas industry.
Shell is a global group of energy and petrochemicals companies. It consists of the businesses of Upstream, Integrated Gas, Downstream, and Projects & Technology. With approximately 90,000 employees in more than 70 countries and territories, Shell is helping to meet the world`s growing demand for energy in economically, environmentally and socially responsible ways.
Marathon Oil Corporation (NYSE: MRO) is an independent international exploration and production company. Based in Houston, Texas, Marathon Oil had net proved reserves at the end of 2011 of 1.8 billion barrels of oil equivalent in North America, Europe and Africa.