Robert R. Workman

PSS Industrial Group Corp. is a investment company vehicle. Its specialties include material handling systems, surface preparation, finishing, welding, accessories, pipeline, inventory management, and equipment rentals. The company was founded in 1987 and is headquartered in Houston, TX.

Modumetal, Inc. manufactures nanolaminated metals with applications across a range of industries including energy, aerospace, automotive, and construction. Its products include corrosion resistant, structural, thermal barrier, and custom alloys. The company was founded by Christina Ann Lomasney and John David Whitaker in 2006 and is headquartered in Seattle, WA.

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.