Christopher Ball (Member, IEEE) received the A.B. degree in physics from Harvard University, Cambridge, MA, USA, in 1992, and the M.S. and Ph.D. degrees from The Ohio State University, Columbus, OH, USA, in 1994 and 1998, respectively. His graduate research focused on millimeter-wave spectroscopic techniques to investigate gas-phase intermolecular interactions at cryogenic temperatures. He served as a Post-Doctoral Researcher with the Harvard-Smithsonian Center for Astrophysics, Cambridge, from 1998 to 2000, where he performed laser spectroscopy measurements of exotic carbon chain and ring compounds in support of optical astronomy applications. Starting in 2000, he joined the Battelle Memorial Institute, Columbus, where he developed optical spectroscopic sensor technologies and analysis methods for defense, environmental, and industrial applications. In 2016, he joined the ElectroScience Laboratory, The Ohio State University, where he continues to perform research and development activities for sensors operating across the electromagnetic spectrum. Recent examples include microwave radiometry for Earth science remote sensing, infrared imaging and spectroscopy for methane detection and food characterization, and millimeter/sub-millimeter wave spectroscopy for trace gas detection.