DMT Staff



Darrel Baumgardner, PhD founded Droplet Measurement Technologies in 1987, and he continues working at Droplet today as Chief Scientist, Emeritus and member of the Board of Directors. He spent twenty years at the National Center for Atmospheric Research in the United States and 14 years as a senior scientist at the Universidad Nacional Autonoma de Mexico, the largest university in Latin America. He is an internationally recognized expert on measurements of aerosol and cloud particles and has developed a number of new techniques for measuring their properties. Darrel obtained his Ph.D. from the University of Wyoming.


Greg Kok is the Director of Research and Development at DMT. Dr. Kok received his Ph.D. In Analytical Chemistry from the University of Michigan. Prior to joining DMT, he taught college-level chemistry and worked at NCAR’s aviation facility, where he was active in instrumentation development and applications.



Alexis Attwood Badder, PhD is Droplet’s primary contact for researchers and scientists studying bioaerosols, black carbon, or cloud condensation nuclei. Her instrument focus at Droplet includes WIBS-NEO, SP2, CCN, PAX, UHSAS, and SP2-XR. Alexis earned her Ph.D. in Atmospheric Chemistry from the University of New Hampshire and continued with postdoctoral research at the National Oceanic and Atmospheric Administration (NOAA). Her research focused on ground based measurement of aerosol optical properties and their impacts on the atmosphere as well as instrument design and development.


Matt Freer is Droplet’s primary contact for cloud physics, aircraft icing, precipitation, and fog measurement applications. His instrument focus at Droplet includes CDP, CIP, PIP, CAPS-DPOL, CCP, BCPD, PCASP, FM-120 and MPS, among others. Prior to joining Droplet in 2012, Matt developed standards for airborne data processing and transmission for the European Facility for Airborne Research (EUFAR) program in Toulouse. Matt also spent several years with the Atmospheric Sciences department at the University of Illinois, Urbana-Champaign doing cloud microphysics research and development of processing algorithms, participating in several field campaigns for the DOE ARM-UAV program. He holds an M.S. in Aerospace Engineering from the University of Illinois at Urbana-Champaign.