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Elizabeth C. Gillispie is a Post Doctorate Research Associate in the Interfacial Geochemistry Group at Pacific Northwest National Laboratory. Dr Gillispie received her Ph.D. and M.S. degrees in environmental soil chemistry at North Carolina State University (Raleigh, North Carolina, USA), and a B.S. degree in environmental geology at the University of Mary Washington (Fredericksburg, Virginia, USA). Her research focuses on understanding complex geochemical processes controlling the fate and transport of contaminants in the soil-vadose-groundwater continuum, particularly in the presence of iron and manganese oxides, and using that knowledge to develop in-situ remediation strategies.

Stephen E. Taylor is a Ph.D. candidate at Washington State University, and fellow for the WSU and Pacific Northwest National Laboratory Distinguished Graduate Research Program (DGRP). He received a B.S. degree in microbiology with a minor in chemistry from Brigham Young University, and an M.S. degree in soil science from Washington State University. His current research focuses on the fate of nanomaterials in terrestrial ecosystems, with a focus on nano- to micrometre-sized plastic contaminants.

Nikolla P. Qafoku is a chief scientist and team lead in the Interfacial Geochemistry Team of the Subsurface Science and Technology Group at Pacific Northwest National Laboratory. He received his B.S. and Doctor of Science degrees in soil fertility and soil chemistry from the Agricultural University of Tirana, Albania. In 1998, he graduated from the University of Georgia with a double degree: M.S. in applied mathematics and computer sciences and Ph.D. in environmental soil chemistry and physics. Nik joined the PNNL team in June of 2000, where he is now Chief Scientist Level V.

Michael F. Hochella, Jr, is an Earth scientist, and a University Distinguished Professor (Emeritus) at Virginia Tech (Blacksburg, Virginia, USA), as well as a Laboratory Fellow at Pacific Northwest National Laboratory (Richland, Washington, USA) concentrating in the area of nano-bio-geo-environmental science on local, regional and global levels. He founded the Virginia Tech National Center for Earth and Environmental Nanotechnology Infrastructure, known as NanoEarth, funded by the National Science Foundation. He is a former president of both the Geochemical Society and the Mineralogical Society of America, and has served on high-level advisory committees at both the US National Science Foundation and the US Department of Energy.