Dresser-Rand Group Inc. is a global supplier of of custom-engineered rotating equipment solutions for long-life, critical applications in the oil, gas, chemical, petrochemical, process, power generation, military and other industries worldwide. It has two segments: new units and aftermarket parts. New units are predominately engineered solutions to new requests from clients. Aftermarket parts and services consist of support solutions for the existing population of installed equipment and the operation and maintenance of several types of energy plants. Its rotating equipment is also supplied to the environmental solutions market space within energy infrastructure. It designs, manufactures and markets engineered rotating equipment and provide services to the worldwide oil, gas, petrochemical, power generation, environmental solutions and industrial process industries. In July 2012, the Company acquired compressed air energy storage property.