Henderson Engineers Inc

AECOM is a global leader in infrastructure consulting, dedicated to delivering a better world through innovative engineering, architecture, and environmental services. The company emphasizes the importance of infrastructure in creating opportunities for all, leveraging connected expertise and technical excellence to achieve transformative outcomes. Generated from the website

Operational for more than 100 years, HNTB Companies is an employee-owned infrastructure firm that serves the federal, state, municipal and private clients. The company offers transportation, engineering, planning and construction management service through HNTB Corporation. It employs design professionals who provide buildings services through HNTB Architecture. The company has a staff of over 4,000 employees in nearly 60 offices throughout the U.S. It offers environmental planning, intelligent transportation systems and management consulting services. The company provides program management, urban design, and planning and structural engineering services. HNTB Companies additionally offers disaster recovery and historic preservation services for highway, toll road, bridge, airport, rail and water projects.

Founded in 1996, Tetra Tech is one of the leading companies in the United States that provides consulting, engineering and technical services related to waterways, harbors and coastal areas. It assists commercial and government clients in the areas of resource management and infrastructure. The company additionally offers environmental, water and wastewater management, security design and infrastructure services. Tetra Tech works with individuals who specialize in science, research, engineering, construction and information technology. Its services include research and development, applied science and technology, program and construction management, operations and maintenance. The company employs more than 8,500 individuals and operates more than 280 offices worldwide. Headquartered in Pasadena, Calif., Tetra Tech maintains one of its offices in Kansas City, Mo.