Barnett is a prominent Professor of Environmental Engineering at Auburn University, USA, with extensive expertise in environmental science and engineering. He holds a PhD in Environmental Science and Engineering from the University of North Carolina, complemented by master’s and bachelor’s degrees in related fields from the University of Tennessee. With a professional career spanning over 38 years, he began his journey as an environmental engineer in industry and government before joining Auburn University in 1993 to start his teaching career. He teaches core courses including environmental chemistry, wastewater treatment, and sustainable design. As a leading researcher, he has secured 17 research grants totaling over $12 million, published more than 50 peer-reviewed papers, and specializes in water quality modeling and contaminant behavior in natural systems. He is a Licensed Professional Engineer (PE) and Board Certified Environmental Engineer (BCEE), reflecting his high professional standing.