His research interests lie in precision tests of fundamental symmetries and interactions, nuclear structure studies via laser spectroscopy, and in the application of laser spectroscopy for ultra-sensitive trace-isotope analysis. He has extensive experience with neutral atom traps of rare isotopes in atomic and nuclear physics and significantly contributed to the development of the Atom Trap Trace Analysis technique. He is the lead-PI of Argonne’s TRACER Center that is aimed to advance the science of krypton dating to a practical level for young and ancient groundwater and glacial ice.