His current research is in the CNEC Simulation, Analysis, and Modeling thrust area, focusing on radiation transport, Monte Carlo, deterministic, and hybrid methods, and sensitivity analysis and uncertainty quantification. He currently has students investigating novel cost-optimization strategies for Monte Carlo variance reduction and a matrix approach for fission chain multiplicity analysis for correlated detector responses. Kiedrowski received his PhD from the University of Wisconsin-Madison in 2009, and worked on the MCNP development team at Los Alamos National Laboratory from 2010-2014. During his time at Los Alamos, Kiedrowski developed the adjoint weighting methods for criticality problems that are in MCNP and authored Whisper, a software package to assist criticality safety engineers in the validation of Monte Carlo radiation transport calculations.