 Uman is probably best known for his work in lightning modeling, which is the application of electromagnetic field theory to the description of various lightning processes.This provides a better understanding of lightning in general and has had a number of important practical spinoffs, the most notable has been a lightning locating system and the redefinition of several important lightning characteristics relative to hazard protection.Uman co-founded Lightning Location and Protection, Inc., a company in the lightning locating equipment business.