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John Jengo

Principal

Photo of John

As a principal, John is a licensed professional geologist (PG) in several states and a licensed site remediation professional (LSRP) in New Jersey. There, he’s been managing a 15-year project to remove lowhead dams on New Jersey’s largest interior river system to restore migratory fish passage, which has been blocked for more than a century.

Over the course of his career, John has investigated and implemented remedial actions at some of the largest contaminated sites in the tri-state region, including three of the seven refineries in the Delaware Valley/Philadelphia area. He’s known for his ability to write technical reports in a way that makes them understandable to both clients and the public. To top it off, the mini-documentary films he’s shot and edited about his dam removal work have proven to be well-received and he’s often asked to deliver presentations and seminars on his dam removal, grist mill archaeology, and wetland restoration work.

John is an active hiker and kayaker who organizes biennial rafting and kayaking trips in the American West for a group of old friends—together, they’ve journeyed down about every major river in the West. Virtually every year since the mid-1990s, he spends a few weeks retracing a portion of the Lewis and Clark Trail for a book he’s writing about the expedition.

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