"Green International Affiliates (Green) has been working with SDE on Boston Water and Sewer Commission Combined Sewer Overflow Separation project in South Boston, North Dorchester/Lower Roxbury. SDE has provided Green with excellent engineering services to support the preliminary design phase of the project. SDE has always been cooperative with Green, and responsive to our inquiries and questions in a timely manner."

- Adel Shahin, P.E., Associate, Green International Affiliates, Inc.

"SDE has dependable, safety-conscious field staff that provided ADS with data on time. Communication with the field staff was trouble-free and their understanding of project goals was fantastic. We would recommend SDE for field work related to inflow/infiltration studies and look forward to working with them in the future."

– Michael Armes, Senior Project Manager, ADS Environmental

"SDE introduced electronic data collection to a complex multi-year field investigation for a high-profile client in 2004. Their data collection methods allowed us to streamline the process and increase the reliability of migrating data from the field into the office, which led to high quality deliverables to our client. None of the other field services firms that we were working with at the time were able to do this as seamlessly and efficiently as SDE. "

– Joe Boccadoro, P.E., Senior Project Manager, AECOM (formerly Earth Tech)

"We have enjoyed an excellent working relationship with SDE throughout the past 9 years we have worked together. SDE’s staff are the most experienced field teams with an expertise for working very efficiently in difficult urban areas while paying great attention to detail. They always deliver high-quality work and have been Tetra Tech’s field crew of choice for many complex projects for our high-profile clients"

– Al Carrier, P.E., Senior Project Manager, Tetra Tech Rizzo