Cullen O’Brien, PE, is a project engineer with LimnoTech. He has extensive experience in the collection of environmental media samples including groundwater, surface water, soil, and sediments. Cullen also conducts surface water monitoring activities which involve the installation and maintenance of remote monitoring instruments. He performs oversight during construction activities and conducts the operation and maintenance of remediation systems. He assists with the production of reports and databases. He uses a computer-aided drafting program and GIS to construct various maps, geologic cross-sections, boring logs, and design drawings. Cullen works at LimnoTech’s Corporate Headquarters in Ann Arbor, Michigan.