Peter Piestrzeniewicz is an Assistant Hydrogeologist at the Water Replenishment District of Southern California (WRD), working on projects related to basin management, groundwater recharge and tracer studies, seawater intrusion, and water quality. His groundwater monitoring roles include water level and sample collection and data logger operations and maintenance. He has over 10 years of experience in geology and hydrogeology and holds a BS in Geology from California Polytechnic University, Pomona.