Olsson Associates

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.

Terracon is a leading provider of geotechnical, environmental, construction and other related services. The company s geotechnical services include subsurface exploration and testing, foundation analysis and design, in-situ testing and performance monitoring, earth structures and retention systems, dynamic analysis and evaluations, soil stabilization and ground improvements, ground water control solutions and pavement designs. Environmental services include site assessments and investigations, remedial designs and implementations, wetlands delineation and mitigation services, industrial hygiene and indoor air quality solutions, regulatory compliance services, environmental management systems and solid waste planning. Construction services include on-site observation and monitoring programs, quality control and assurance programs, field and laboratory testing, material selection consulting, forensic investigations and construction management services. Terracon is headquartered in Lenexa, Kan.