Dennis works with public and private clients with a range of water management needs, from the development of potable water supply and storage systems to the beneficial reuse of municipal and industrial wastewater. He specializes in groundwater exploration and development studies, production well and wellfield design, groundwater/surface water interaction studies, wellhead protection program development, and water rights consultation. Prior to joining GSI in 2019, Dennis spent several years with the Oregon Water Resources Department as a senior hydrogeologist responsible for managing the groundwater resources of northwest Oregon.