1995 Dr. rer. nat. in condensed-matter physics from the University of Munich, Germany; 1995-2000 Postdoc at DESY, Hamburg; worked on x-ray holography and x-ray quantum optics; 2000-2015 Visiting scientist, then staff scientist at Argonne National Lab, Illinois, USA; 2015-2019 worked at Incom, Inc. Charlton, MA, USA on the Large-Area Picosecond Photodetector; 2020-present Consultant under business name of Quantum Optics Applied Research with locations in Illinois and Germany