Rich began his career at Battelle where he managed studies of the safety and risk of a variety of nuclear facilities including commercial nuclear power plants and a number of DOE’s non-reactor nuclear facilities including the Pantex Plant and Portsmouth Gaseous Diffusion Facility. He led the severe accident analysis task for the WASH-1400 study. He was a consultant to the TMI Special Inquiry Group. He participated in the analysis of severe accident progression and source terms for the five reference plants in the NRC's reexamination of the risk of light water reactors, NUREG-1150. He authored two chapters of the PRA Procedures Guide, NUREG/CR-2300. From 1995 to 2007, under contract to PNNL, he had responsibility for the oversight of safety hardware upgrades in Ukraine, Russia, Armenia and Lithuania in DOE’s program to improve the safety of former Soviet Union reactors. Rich served on the advisory committee for the No-Action Alternative Analysis for the Yucca Mountain EIS.