Golder Associates is a global group of companies providing earth engineering and environmental science services. With over 2,700 employees in over 84 offices worldwide, Golder is one of the largest employee-owned engineering and earth science companies in the world.

John Reilly provides direct, personal consulting in strategic planning, organization, design, construction and procurement of large, complex building and infrastructure programs and underground facilities.
Specialties include management, partnering, alliancing, contracting, teambuilding, risk mitigation, disputes resolution and the implementation of new technologies for underground construction.

Parsons is a national and international organization specializing in the planning, design, construction engineering, and program management of transportation projects from concept through construction. Parsons maintains offices in 21 states, the District of Columbia, and 17 countries.
Parsons, 100 percent employee owned, is one of the world's leading full service engineering and construction companies. Parsons was named the "Number I" design firm in the United States by Engineering News-Record, having earned the top spot in 1995 and 1996.