Peter Cartwright entered the water purification and wastewater treatment industry in 1974, and has had his own consulting engineering firm since 1980. He has a degree in Chemical Engineering from the University of Minnesota (1961) and is a registered Professional Engineer in that state. Cartwright has provided consulting services to more than 250 clients globally. He has authored approximately 200 articles, written several book chapters, presented over 200 lectures in conferences around the world, and is the recipient of several patents. He also provides extensive expert witness testimony and technology training courses.