James L. Burch is Vice-President of the Space Science and Engineering Division of Southwest Research Institute (San Antonio, TX) and Prinicipal Investigator of the Magnetospheric Multiscale (MMS) mission. He is an experimental space physicist investigating various aspects of the interaction of the solar wind with the magnetospheres of the Earth and Saturn and with comets. He has been Principal Investigator for instruments on the NASA Dynamics Explorer spacecraft and the Space Shuttle. Beginning in 1996, he was P.I. of the first NASA Medium - Class Explorer mission (IMAGE), which performed pioneering global, multispectral imaging of plasmas populating the Earth’s magnetosphere. Also starting in 1996 and continuing until 2016, he is P.I. of the Ion and Electron Sensor (IES) on the European Space Agency’s Rosetta mission, which in 2014 became the first mission to rendezvous with and orbit a comet. Dr. Burch received his Ph.D. in space science from Rice University in 1968. He isa Fellow of the American Geophysical Union and in 2010 was awarded the AGU’s Fleming Medal.Roy B. Torbert is a professor of physics at the University of New Hampshire (UNH) and Director of the SwRI-EOS (Earth, Oceans, and Space) Department, which is located on the UNH campus. He is the Principal Investigator for the Electron Drift Instrument on the CLUSTER (ESA/NASA) mission and has been Co-Investigator on many NASA missions, most recently the Van Allan Probes (RBSP), WIND, and POLAR missions. He has been principal investigator on multiple sounding rocket missions for NASA. Currently, he serves as the Lead Investigator for the FIELDS instrumentation suite for the Magnetospheric Multiscale (MMS) mission, as well as its Deputy Principal Investigator. He received his Ph.D. in physics from the University of California in Berkeley in 1979.