Stephen Yanicak is a Natural Science Manager and geologist with the New Mexico Environment Department at Los Alamos. He manages a team of scientists that have been supporting State and DOE/UC groundwater investigations at Los Alamos National Laboratory for the past 13 years. Hydrologists staffed at the State Environment Department office in Los Alamos specialize in evaluating and delineating radionuclides and other isotopic and chemical tracers on the Pajarito Plateau within the vicinity of Los Alamos National Laboratory. Yanicak has an M.S. from New Mexico State and a B.S. from Sonoma State.