Stantec

Established in 1951, URS Corporation offers a range of professional planning, engineering and architectural design, environmental, construction, and program and construction management services. It also offers system integration, operations and maintenance, management and specialized technical services. With over 50,000 employees, URS Corporation maintains a global presence. It provides services to the transportation, power, industrial infrastructure and process, environmental, nuclear management, wastewater, mining, and defense and security industries. URS Corporation has the URS, EG&G and Washington divisions. The URS Division provides planning, design, and program and construction management services for all types of transportation and water resources infrastructure, as well as for health care complexes, schools, courthouses and other public buildings. The EG&G Division primarily serves government clients, including the departments of Defense and Homeland Security. Headquartered in San Francisco, URS Corporation maintains a presence in St. Louis.

NPN Environmental Engineers Inc., founded in 1993, is a Fenton, MO-based company known for its commitment to providing practical and economical environmental solutions while prioritizing quality and liability protection. Celebrating its 30th anniversary, the company has established strong relationships across various industries through its integrated environmental services and a team of experienced professionals. The company's extensive range of services includes environmental site assessments, regulatory compliance, and remediation strategies, all tailored to meet the long-term goals of its clients. NPN Environmental distinguishes itself through its dedication to high-quality service, supported by a robust quality assurance and control program led by registered professional engineers. Generated from the website

Shannon and Wilson Inc. is a geotechnical and environmental consultant firm located in St. Louis, Mo. Founded in 1954, the firm provides services for the design and construction of transportation facilities, buildings, civil-work structures, military facilities, industrial plants, infrastructure components and energy generators. It specializes in arctic engineering, geographic information systems, hydrogeology, laboratory testing, seismic and tunneling. The firm also works for the projects in transportation, waterfront facilities, rail and property development for both the public and private sector.