Dr. Jonathan Retter is a Physical Scientist at the US EPA. Prior to the EPA, Jonathan was a research engineer at the National Institute of Aerospace and a postdoctoral researcher at Sandia National Laboratories. He received a PhD in Aerospace Engineering from the University of Illinois at Urbana-Champaign in 2018. Dr. Chris Owen, based in Durham, NC, USA, is currently a Physical Scientist at the US EPA. In 2009, Chris earned a PhD in Environmental Engineering at Michigan Technological University. Annamarie Leske is a data analyst at Johns Hopkins Applied Physics Labs. She received her Bachelors degree in Applied Mathematics in 2023 from North Carolina State University. Dr. Michelle G. Snyder, based in Durham, NC, USA, is currently a Senior Technical Principal focused on Air Quality & Compliance at WSP USA Inc (WSP). Prior to WSP, Dr. Snyder worked as a researcher at the U.S. EPA and the University of North Carolina. In 2011, she earned a Doctor of Philosophy (PhD) in Physics from North Carolina State University. Rhett Sargent recently completed his Bachelor of Science in Statistics from Virginia Tech University. Dr. David Heist, based in Durham, NC, USA, is currently a Research Physical Scientist at the US Environmental Protection Agency (EPA). David Heist previously worked at the National Oceanic & Atmospheric Administration and the University of Surrey. David Heist holds a 1988–1994 Doctor of Philosophy (PhD) in Mechanical Engineering at Cornell University.