This work involves tasks ranging from semi-skilled to skilled in the maintenance, repair, and construction of grounds and facilities typically requiring the operation of heavy and/or specialized airport equipment on Dwight D. Eisenhower National Airport and Col. James Jabara Airport, including those used for airfield snow and ice control. Work also includes inspection, service, preventive maintenance, and repairs of equipment, commercial irrigation systems, and complex airfield signing and pavement marking systems. Work is often performed independently but under the general direction of a supervisor. A supervisor gives direction in tasks, task priority, and special instructions when changes are necessary in established procedures.