John W. JengoJohn W. Jengo's career as a geologist, hydrogeologist, and licensed hazardous waste site remediation professional involved cleaning up hazardous wastes for several decades prior to his transition into restoring rivers and improving migratory fish pasage via dam removals and enhancing wetlands harmed by industrial discharges. As a lead technical writer, simplified explanations of complex problems and solutions for clients and regulatory agencies. He is the author of numerous peer-reviewed publications and presentations. Read More Read Less