Mark Gross, Ph.D., P.E., is a professional engineer, licensed in multiple states. He has worked as a professor of civil engineering, a training manager for a wastewater equipment manufacturer, and a consulting and design engineer. His career includes teaching and research in water, wastewater and soil, working with small communities on water and wastewater collection and treatment systems, and petroleum and hazardous waste remediation. In his free time, he enjoys fishing, woodworking, gardening, and reading.