George Pierson

Kleinfelder, Inc. provides environmental engineering and construction management services. It offers architecture and design, environmental sciences and engineering, project management, construction materials engineering and testing, facility and operations compliance, risk management, water science and engineering, design engineering, geotechnical and geologic engineering, and strategic planning. The company was founded by Jim Kleinfelder in 1961 and is headquartered in San Diego, CA.

The Kleinfelder Group, Inc. engages in the provision of engineering services. It offers architecture and design, construction materials engineering and testing, design engineering, environmental sciences and engineering, facility and operations compliance, geotechnical and geologic engineering, project management, risk management, strategic planning, sustainability, and water science and engineering services. The company was founded by James H. Kleinfelder in 1961 and is headquartered in San Diego, CA.

Kleinfelder West, Inc. provides solutions on transportation, water, energy, and other private infrastructure. The company was founded by James H. Kleinfelder and is headquartered in San Diego, CA.

The Vertex Cos., Inc. provides forensic, engineering, construction, environmental, and digital and technology solutions. It offers forensic consulting, engineering design, contracting solutions, environmental consulting, industrial hygiene, remediation services, and backup disaster and recovery solutions. The company was founded by William J. McConnell, James B. O’Brien, and Jeffrey E. Picard in 1995 and is headquartered in Weymouth, MA.

Railworks LLC provides heavy construction services. The company is headquartered in Yankton, SD.

Terracon Consultants, Inc. engages in the provision of consulting engineering solutions. Its services include environmental, facilities, geotechnical, and materials. The firm focuses in the markets of agriculture, commercial/retail, disaster response, federal, healthcare, oil and gas, and technology. The company was founded by Gerald Olson in 1965 and is headquartered in Olathe, KS.