Dennis F. Hallahan has been with Infiltrator Systems for 14 years and holds the current position as Technical Director. Dennis has 26 years of experience with the design and construction of decentralized systems. Dennis also is responsible for product research and testing at Universities, test centers and private consultants. His department develops system sizing charts for national and international approvals and assists customers and field representatives in the planning and review of large commercial decentralized systems. Many of these systems are in excess of one million gallons per day (MGD).

Dennis also holds patents for on-site wastewater products and is a member of the Water Environment Federation and of the National Onsite Wastewater Recycling Association and has served for several years on the National Onsite Wastewater Recycling Association (NOWRA) Technical Practices Committee. He has authored several articles for on-site industry magazines and has given numerous presentations nationally on the science and fundamentals of on-site wastewater treatment systems. He received his MS in civil engineering from the University of Connecticut and his BS in civil engineering from the University of Vermont. Dennis is a registered professional engineer in Connecticut.