Environmental Science Associates (ESA) is pleased to announce that David Renfrew, PG, CPSWQ, QISP-ToR, QSD/QSP, has joined the firm as Client Development Director, focusing on National Pollutant Discharge Elimination Systems (NPDES) and Water Quality Services for California. With more than 30 years of experience in the environmental industry, David brings extensive expertise in NPDES permit compliance and complex water quality programs.
“David’s ability to translate regulatory landscapes into actionable, compliant, and cost-effective strategies for our clients makes him an invaluable asset,” said Ruta Thomas, Senior Vice President and the firm’s Southern California Regional Director. “We look forward to the depth of insight he will bring to our water resource initiatives as we support our clients through evolving challenges and an increasingly complex regulatory environment.”
Throughout his career, David has served as a technical authority on Municipal Separate Storm Sewer System programs, Industrial and Construction General Permits, and Clean Water Act litigation. His background includes managing major on-call contracts for small, medium, and large municipal clients; port and airport clients; and private industrial clients and developers throughout California, where he led monitoring, reporting, and pollution prevention initiatives.
David’s strategic approach to regulatory policy has consistently provided clients with pathways for economically responsible compliance. As a Certified Professional in Storm Water Quality, a Qualified Industrial Stormwater Practitioner-Trainer of Record, and a Qualified Storm Water Pollution Prevention Plan Developer, he excels at developing innovative solutions for Total Maximum Daily Load (TMDL) compliance, site-specific objective studies, and resiliency planning.
“I am thrilled to join ESA and become part of such a talented, multidisciplinary team,” David shares. “What stands out is the unique combination of expertise and advanced technology that helps our clients navigate the most complex environmental and regulatory challenges. I look forward to leveraging these capabilities and my deep client relationships to expand our presence in the water quality market and deliver resilient, sustainable outcomes for the communities we serve.”
Whether addressing new requirements or planning for long-term resource stewardship, ESA is dedicated to delivering innovative, science-driven solutions that protect both budgets and ecosystems. If you have questions about our water quality services in California, reach out directly to Dave Renfrew.
