My main research interests are in wave-particle interactions, wave propagation and space weather. I study how wave-particle interactions lead to the transport, acceleration and loss of high energy charged particles trapped in the external magnetic field of the Earth and planets. My current work is to lead the development of better systems to forecast radiation exposure to satellites during magnetic storms and other space weather events. I am also working on hazard risk assessments of the impact of severe space weather on the growing number of satellites in orbit.