John Rudolph is a senior aquatic ecologist in GEI’s Carlsbad, California office. John works at the intersection of water quality, sediment quality, ecotoxicology, and ecosystem impacts.  He has more than 25 years of experience managing a diversity of aquatic biological, ecological, and toxicological environmental programs for commercial, municipal, academic, and federal clients. John has more than 18 years specialized experience managing complex environmental water, sediment, and  biological sampling programs for both public and private agencies, including stream, estuarine, lake, and ocean sampling. He has extensive aquatic stream bioassessment monitoring experience, as well as lake/reservoir nutrient cycling expertise including harmful algal bloom (HAB) mitigation, and marine estuary benthic community monitoring experience. In one of his previous positions, John served as a Toxicity Bioassay Laboratory Manager managing toxicity programs conducting freshwater, marine, sediment, and soil bioassay testing utilizing a wide variety of organisms (fish, echinoderms, polychaete and oligochaete worms, molluscs, crustaceans, and algae).