Harlan has expertise in infrastructure planning and feasibility studies, commercial and residential subdivision design, site design, stormwater management, sanitary sewer, water main, storm sewer design, transportation engineering, project permitting and coordination with regulatory agencies. Harlan also is experienced in boundary and topographic surveys, preparation of plats and legal descriptions, and construction management/inspection/layout.

He is a licensed professional engineer in Illinois and Wisconsin and a licensed professional land surveyor in Illinois. He is a member of the National Society of Professional Engineers, the Illinois Society of Professional Engineers, the Illinois Land Surveyors Association, the American Society of Civil Engineers, the American Public Works Association and the American Council of Engineering Companies.