Professor of Theoretical Astrophysics at Caltech (2014-), Assistant Professor of Theoretical Astrophysics (2009-2014), Sherman Fairchild Prize Postdoctoral Scholar (2008-2009), Postdoctoral Researcher at the University of Arizona (2006-2008), PhD Albert Einstein Institute and University of Potsdam 2007 (advisors: Schutz & Seidel), Diplom in Physik Universitaet Heidelberg 2003.