Mathematician turned software engineer. Original systems architect for Models-3 (which became CMAQ etc.); original author of SMOKE emissions model; author/maintainer for I/O API used by CMAQ, SMOKE, and others.
Wrote MAQSI-RT software system for world’s first air quality forecasts (in a joint project of Penn State and North Carolina Supercomputing Center); author of AHRMS hydrological forecast system.