My main focus of research is studying materials in primitive meteorites and returned cometary and asteroidal samples from space missions. I use a secondary ion mass spectrometer (SIMS) to determine isotope signatures of these primitive solids that formed in the protoplanetary disk, in which our Earth and other planets had evolved. I am interested in developing in-situ micro-analytical methods using SIMS for geochemical and cosmochemical applications, especially for high precision isotope ratio measurements of the 1-10 µm scale in rocks and minerals.