We study the Sun and its extended atmosphere, including processes from the solar interior to the edge of the solar system’s bubble of plasma and magnetic field known as the heliosphere. . The Sun plays a major role in everything from the course of planetary habitability to space environment effects on technologies affecting our future, to informing visionary research on distant stellar phenomena and their neighborhoods. Our science is achieved on a spectrum of scales, from kinetic plasma studies in the solar wind using in-situ observations, to energetic photon studies of coronal acceleration processes in flares and Coronal Mass Ejections, to whole-heliosphere studies. Our group has a long-enduring and continuing history of innovation in both in-situ and remote sensing instrumentation, as well as fundamental plasma theory, spacecraft data analysis, and modeling of the near-sun environment and the solar wind. Importantly, our group is interdisciplinary and interconnected with the other three science directorates; members in our directorate are core members and co-investigators on missions, investigations, and studies spanning the entire science directorate at SSL.