His research interests include solar wind interaction with Earth’s magnetosphere, and the magnetic reconnection process throughout the plasma universe. He is an author and co-author of more than 240 publications, including 6 Nature Letters and more than 15 Physical Review Letters. He reported the first spacecraft detections of bi-directional plasma jets due to magnetic reconnection [Nature, 2000]. He led the discovery of a reconnection X-line extending more than 390 Earth radii in the solar wind [Nature, 2006]. Recently he reported a new type of fast magnetic reconnection involving only electrons, which occurs in turbulent plasmas [Nature, 2018]. He leads an Inter-Disciplinary Science team of NASA’s Magnetopsheric Multi-Scale mission to study reconnection in the near-Earth space. He is a co-investigator of the NASA THEMIS and Parker Solar Probe missions. He served as a member the US National Academies Solar and Space Physics Decadal Survey 2013. He is a Fellow of the American Geophysical Union.