Dwight W. Rettig

Ameron International Corp. is a manufactures engineered products and materials for the chemical, industrial, energy, transportation and infrastructure markets. It produces water transmission lines: fiberglass-composite pipe for transporting oil, chemicals and corrosive fluids and specialized materials and products used in infrastructure projects, such as poles, construction materials and wind towers. The company was founded in 1907 and is headquartered in Houston, TX.

Robbins & Myers, Inc. designs, manufactures and markets engineered, application-critical equipment and systems for the energy, industrial, chemical and pharmaceutical markets. It operates through two segments: Energy Services and Process & Flow Control. The company was founded on APril 23, 1990 and is headquartered in Houston, TX.

National Oilwell, Inc., is a company which designs, manufactures and markets mechanical components for both land and offshore drilling rigs as well as land drilling and well servicing rigs. The company has it's headquarters in Houston, Texas. It is a subsidiary of National Oilwell Varco, Inc.