Rob is an environmental scientist specialising in water quality and aspects of stream ecology. He has an MSc in Earth Sciences (Waikato University) and PhD in Environmental Engineering (Water Resources; Oregon State University). His research interests range over general water quality, diffuse pollution from land uses (particularly pastoral agriculture), microbial contaminants and disinfection, optical water quality, natural wastewater treatment, and physical aspects of stream and riparian ecology. Applied/consulting work includes development of water quality guidelines/standards, assessment of wastewater assimilation, and impacts of livestock on streams. Rob is scientific spokesperson for the National Rivers Water Quality Network (NRWQN).