Marc is a Principal Engineer/Groundwater Hydrologist with ARCADIS (Millersville, MD) and is part of their Technical Knowledge and Innovation group of the Environment Division. Marc has been with ARCADIS for over 13 years and has extensive experience in developing and applying numerical (and analytical) groundwater models to hazardous waste sites in a wide variety of hydrogeologic settings located throughout North America. Marc provides senior-level hydrogeologic support services in the areas of groundwater flow and transport modeling, quantitative hydrogeologic analysis, data evaluation and visualization, geostatistical analysis, and helps direct field activities for site characterization/investigation and remedial design.