DPR Construction

Operational for more than 25 years, Griffcon is one of the leading designers and builders of medical facilities in the Southern California. The company works wiiht several diagnostic equipment manufacturers, such as Philips Medical Systems North America, Toshiba America Medical Systems, Hitachi Medical Systems America, GE Medical Systems and Siemens Medical Systems. Griffcon has completed several projects for the Department of Defense, special procedures, healthcare imaging centers and diagnostic rooms. The company has received the certificate of liability and workers compensation insurance.

Hal Hays Construction, also known as HHCI, offers site preparation and demolition services. The company provides civil engineering construction solutions. It undertakes projects for hospitals and federal government and military agencies. Hal Hays Construction offers excavation, grading, and environmental remediation and restoration services. It also provides fire and campground rehabilitation solutions. The company offers obliteration and decommissioning services. Hal Hays Construction provides land clearing and flood and erosion control solutions. It additionally offers design and build services. The company has undertaken projects for the Department of Veteran Affairs, Department of Homeland Security, and California Department of Forestry and Fire Protection.

Flatiron is one of the leading providers of transportation construction and civil engineering in North America. Its core competencies include major bridge, highway and rail projects. Flatiron also operates as a contractor in public-private partnership projects. Founded in 1947, the firm is a subsidiary of HOCHTIEF, one of the world's leading international construction service providers.