Douglas S. Dunkelberger

The Atkins North America Holdings Corp. provides program management, planning, design, and construction management services. It operates through two segments: consulting services and construction services; the consulting services segment provides a variety of design and related consulting services. it services includes program management, construction management, planning, surveying, geographic information systems, environmental assessments, engineering design, architectural and interior design, site assessment, and regulatory compliance; the construction services segment includes the operations of peter brown which provides construction management services focusing primarily on building schools, jails, higher education facilities and institutional buildings. The company was founded in 1960 and is headquartered in Tampa, FL.

Atkins North America, Inc. provides architecture and engineering services. It serves public and private clients in meeting the planning, environmental, engineering, architecture, construction management, and program management needs of its clients. The company was founded in 1960 and is headquartered in Tampa, FL.

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.

RGA Environmental, Inc. provides environmental consulting services. The firm serves in the area of industrial hygiene, health and safety, and training and environmental projects. It serves for retail, real estate, government, health care, education, hospitality, energy, manufacturing and insurance sector. The company was founded by Robert E. Gils in 1985 and is headquartered in Emeryville, CA.