Mark Baldwin

T-3 Energy Services, Inc. designs, manufactures, and repairs custom-machined well control performance parts and components for oil and gas industry installations. Its products include valves, chokes, actuators, blow out preventers, manifolds, and wellhead equipment. The company was founded in 1989 and is headquartered in Houston, TX.

Veritas DGC, Inc. provided integrated geophysical, geological and reservoir technologies to the petroleum industry worldwide. The firm produced 4D surveys to record fluid movement in the reservoir by repeating specific 3D surveys over time. The company was headquartered in Houston, Texas.

Dresser-Rand Group, Inc. manufactures rotating equipments for oil, gas, petrochemical, and process industries. It is engaged in the design, manufacture, sale and servicing of centrifugal and reciprocating compressors, gas and steam turbines, gas expanders and engines and associated control panels. The firm operates through two segments: New Units and Aftermarket Parts and Services. The New Units segment manufactures highly-engineered turbo and reciprocating compression equipment and steam turbines. This segment includes engineering, manufacturing, project management, packaging, testing, sales and administrative support. The 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. The segment includes engineering, manufacturing, project management, installation, commissioning, start-up and other field services, repairs, overhauls, refurbishment, sales and administrative support. The company was founded in October 2004 and is headquartered in Houston, TX.

NextiraOne LLC provides integrated network solutions for enterprises. It engages in planning, designing, implementing and supporting traditional and converged communications networks. The firm offers Internet protocol telephony, data and voice, information security and professional solutions. The company is headquartered in Lawrence, PA.

Part of Johnson Controls International Plc, Keystone International, Inc. is a manufacturer and marketer of specialty valves and related products. The company is based in Houston, TX. The company was founded by Heather A. Wilson.

First Reserve Management LP (First Reserve) is a private equity firm founded in 1983. The firm is headquartered in Stamford, Connecticut.