Major area of interest is geodesy, ranging from geodetic theory, technique, and software development of GIPSY-OASIS, to the application of space geodesy to solid Earth science. Education: B.Sc. physics, 1981, Queen Mary College, University of London; Ph.D. physics, 1986, California Institute of Technology. Employment: Group Supervisor, Space Geodesy and Geodynamics Group, Jet Propulsion Laboratory, 1985-1994; Professor of Space Geodesy, University of Newcastle, 1994-1999; Professor, University of Nevada, 1999-present. Publications: Author and co-author of 104 refereed publications with 4835 citations; 35 in AGU journals and books; 5 in Nature, Science, and Geology; 3 patents. Awards: Fellow of AGU (2005); IGS Certificate of Appreciation for Outstanding Service (2012); GPS World Magazine GNSS Leaders to Watch (2009); The Space Foundation Space Technology Hall of Fame, Certificate of Commendation (2004); UNAVCO Certificate of Recognition (2004); E.B. Burwell Jr. Award, Geological Society of America (2004); Geothermal Resources Council Best Paper Award (2003); Association of Engineering Geologists Publication Award (2002); Fellow of IAG (1999); AGU Geodesy Section Outstanding Student Paper Award (lead author Emma Hill, 2002); AGU Geodesy Section Outstanding Student Paper Award (lead author Thierry Gregorius, 1999) NASA Software of the Year Award, runner-up (1995); 5 NASA Certificates of Recognition and 3 NASA Group Achievement Awards (1991-1999); Shell Technology and Innovation Award (1997); Jet Propulsion Laboratory Director's Research Achievement Award (1989); American Astronomical Society Bruno Rossi Prize (1987); Physics Student Award, Queen Mary College, Univ. London (1981).