Corporate Members


AECOM is a global provider of professional technical and management support services to a broad range of markets, including transportation, facilities, environmental, energy, water and government. With approximately 46,000 employees around the world, AECOM is a leader in all of the key markets that it serves. AECOM provides a blend of global reach, local knowledge, innovation, and technical excellence in delivering solutions that enhance and sustain the world’s built, natural, and social environments. A Fortune 500 company, AECOM serves clients in more than 100 countries.

For more than 30 years, AECOM has been a leader in providing planning, design, construction, and program management services for combined sewer overflow (CSO), sanitary sewer overflow (SSO), and stormwater projects for municipal clients across North America. Our wet weather team includes professionals with proven experience in master planning, collection system modeling, rehabilitation, urban planning, green infrastructure, regulatory negotiation, and large diameter infrastructure design and construction. Our approach leverages the diverse background of our staff to develop holistic and watershed based solutions to wet weather challenges, resulting in cost-effective options to improve water quality and comply with regulatory requirements.

Contact: Geoff Grant
(513) 878-6862

American Structurepoint, Inc

Black & Veatch

Brown and Caldwell

Greeley and Hansen

Greeley and Hansen has specialized in water and wastewater engineering since our establishment in 1914. With professional staff located in offices throughout the United States and South America, the firm understands that all CSO cities, regardless of size, face the same dilemma: balancing the environmental benefits of CSO control with the costs. Greeley and Hansen has developed a CSO planning and implementation approach that has resolved this dilemma for communities across the nation.

Greeley and Hansen’s Wet Weather Team is comprised of professionals from around the country with expertise in all aspects of collection system management, including CSO, SSO, storm water issues, data management and analysis, infrastructure assessment, and repair and rehabilitation. The focus of the team’s efforts is to completely understand the hydraulics and physical condition of each collection system, maximize the flexible elements of policies, and ensure dollars spent produce actual benefits.

Hazen and Sawyer


HDR specializes in guiding complex projects and solving whatever challenges may arise for its clients in the public and private sector. More than 4,500 employee-owners in over 120 locations pool their strengths in architecture, engineering, environmental science, consulting, planning and construction management to provide solutions beyond the scope of traditional architecture/engineering/consulting firms. Focusing on the use of automation and innovative design elements, we produce results that meet our client’s needs.

Headquartered in Omaha, Nebraska, HDR was founded in 1917. The company pioneered water and sewer systems for new cities and towns throughout the Midwest, helping them emerge from frontier status. Our firm has been providing complete professional engineering services in the wastewater field since that day. Ranked in the Top 10 of Engineering News-Record’s 2005 Top 500 Design Firms in both the Water and Sewer/Waste markets, HDR has established its position as a leader in the field by combining technical innovation with practical solutions.

HDR has national expertise in CSO related issues with clients that include many small, medium and large municipalities. We are a nationally recognized firm experienced in all aspects of planning, designing, permitting and operating utility systems. Our services include studies, site investigations, regulatory negotiations and compliance strategy, rainfall/runoff analysis, system modeling, conceptual and final designs, flow monitoring and projection, construction contract administration and field observation, operation and maintenance manuals, CSO treatment, CSO outfalls/outlets, condition assessment, rehabilitation, start-up services, training and troubleshooting. These services are performed by our engineers, scientists and technicians who are experts in the wastewater field. Our professionals offer a balanced approach combining the knowledge of hands-on research with the experience of applying new technologies to systems across the country.

Contact: Michael J. McBride
(617) 357-7758


Stantec Consulting Services, Inc.