Biography: Hans-Peter Plag After some years as carpenter, Hans-Peter Plag studied mathematics and geophysics in Berlin and obtained his PhD in Natural Sciences in 1988 from the Free University of Berlin. From 1988 to 1997 he was head of a research group in geodynamics at the University of Kiel, Germany, and from 1997 to 2004 head of department "Global reference" at the Geodetic Institute of the Norwegian Mapping Authority in Norway, where he also was professor (mathematical models in geodesy) at the University of Oslo. Since 2004, he is a research professor at the University of Nevada, Reno, and affiliated with the Nevada Geodetic Laboratory and the Nevada Seismological Laboratory. His main fields of expertise are in solid Earth geophysics, global geodynamics, the rheology of the Earth's mantle and continuum mechanics, deformation of the solid Earth, Earth system dynamics and global change, global to local sea level changes, space geodesy and geodetic reference frames. Main activities are related to the Global Geodetic Observing System (GGOS) and the Group on Earth Observations (GEO). In his career, he has led more than fifteen large international projects, chaired international programs and committees, organized numerous international workshops and conferences, most often as chair of the program and/or organizing committees, edited many special issues and proceedings, and coordinated and edited two international community reports with up to 40 participating authors. Since 1994, he is a member of the Editorial Board of the Journal of Geodynamics and since 1996 Editor-in-Chief for geodesy for Physics and Chemistry of the Earth.