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Petroleum Helicopters International, Inc., is an American commercial helicopter operator, founded in 1949, by Robert L.
Macri Concrete is a Dillsburg, PA-based company in the Energy and Utilities sector.
Rock Energy Co. LLC is a Bakersfield, CA-based company in the Energy & Utilities sector.
Houston-based Southwest Energy, L.P. established itself during a transitional period of fundamental change by focusing on responsible, quality service that had been missing for years. The company found its niche as a flexible, experienced, and financially sound marketer, and has been setting the example ever since.