Craig Divine has 15 years of experience in hydrogeology, subsurface characterization and remediation, and hydrogeochemistry. His expertise includes geosystem characterization and conceptual model development, contaminant transport and fate, and remediation system design and operation. He has expertise in design and analysis of tracer tests, chaired sessions at conferences, given presentations, and written peer-reviewed journal articles. Divine has significant experience and publications regarding groundwater-surface water interactions and has pioneered use of dissolved gas tracers to characterize groundwater-surface water interactions.