J. Andrew Lange, Inc. is a company built on a reputation for customer service and technical expertise. Technical knowledge of the products represented with design and engineering help means Lange can offer the best combination of products and process to solve water and wastewater challenges.


J. Andrew Lange, Inc, a second-generation family business founded in 1968 is a manufacturers representative for water, wastewater treatment and water storage equipment. Since 1968, J. Andrew Lange has provided customers with reliable products, technical expertise and outstanding customer service. When a water or waste water problem is encountered, contact Lange to provide a solution.
Julie Barown
Julie BarownPresident
Julie Barown, P.E. is the President and Owner of J. Andrew Lange with 20+ years of experience in the water and wastewater industry, she has designed many new and upgraded wastewater treatment and collection systems, water treatment and distribution systems, and stormwater systems. Julie is also very involved in State and Local professional organization Committees and Boards.

Julie has three children and a husband, enjoys hiking, walking, the outdoors and nature as much as she can, and in her spare time is always looking for a new adventure to undertake, typically house renovations and community projects. She also loves binge listening to podcasts.

Julie graduated from the civil engineering department at Rensselaer Polytechnic Institute (RPI) and is a licensed professional engineer in NY State.

Mike Deyulio
Mike DeyulioVice President
Michael Deyulio is the newest member of the Lange Team. Mike brings over 20 Years of leadership experience with him. In the course of his career, Mike has worked in all facets of Construction, Building Automation and Solution Based Value Engineering for both municipal and industrial projects.

Away from the office he spends time with his Family and Friends. He has one daughter. In his spare time he hosts a weekly Podcast and sings in (2) local bands.

Margery Lange Keskin
Margery Lange KeskinConsultant
Margery Lange Keskin, daughter of J. Andrew Lange is Consultant to and former owner of J. Andrew Lange, Inc, a second generation family business formed in 1968.

Margery holds a Bachelor of Science degree in Medical Technology from Hartwick College, and a Master of Business Administration from Clarkson University.