Dr. Guswa has more than 45 years of experience as a hydrogeologist and groundwater scientist. His experience ranges from planning, directing and implementing field investigations of groundwater systems to the application of analytical and numerical models to simulate groundwater systems. He has provided consulting services to local, national and international governmental agencies as well as commercial clients in the United States and Canada. His work experience includes planning and directing programs for regional and local groundwater resource evaluation; supervision of deep and shallow test well drilling and sampling programs; design and supervision of aquifer testing, monitoring and analysis programs; analysis of groundwater/surface water interactions; development and application of groundwater flow, energy and chemical transport models; assessment of soil and groundwater contamination; evaluation of vapor intrusion potential from contaminated soil and groundwater; evaluation and conceptual design of remedial systems; and participation in regulatory negotiations related to Remedial Investigation/Feasibility Studies, Remedial Design and Remedial Actions. He has also provided expert opinion and testimony as part of mediation, arbitration and litigation concerning soil and groundwater contamination, vapor intrusion potential, groundwater and soil remediation, as well as hydrogeology and hydrology.