Kenneth D. Ellsworth, P.E. is the Managing Member of Keystone Environmental Services (KES) and Director of Technical / Material Testing. He also serves as Managing Member of Keystone Associates Architects, Engineers and Surveyors, LLC. He has 30+ year’s extensive experience in civil engineering and other engineering disciplines.

Richard J. Tarnowski, C.E.P., C.E.I. is a Member and Director of Environmental Services of KES. He has 39+ years of extensive experience in both public and private environmental consulting and remediation. His responsibilities include department, employee and project management, QA/QC for the environmental laboratory aspect of KES in addition to marketing and business development.