Supervise and coordinate activities of crew engaged in operating and maintaining engines, boilers, deck machinery, and electrical, sanitary, and refrigeration equipment aboard ship.

Other names for Ship Engineers: Barge Engineer, Chief Engineer, Deck Engineer, Deckhand, Engineer, Equipment Operating Engineer, Ferry Engineer, Fire Boat Engineer, Fire Department Marine Engineer, Harbor Engineer, Harbor Tug Engineer, Inland Marine Towing Vessel Engineer, Licensed Marine Engineer, Marine Engine Mechanic, Marine Engineer, Marine Mechanic, Oiler, Operating Engineer, Operating or Equipment Maintenance Marine Engineer, Port Engineer, Ship Engines Operating Engineer, Striker, Towboat Engineer, Tug Boat Engineer, Tugboat Engineer,

• Monitor the availability, use, and condition of lifesaving equipment and pollution preventatives, in order to ensure that international regulations are followed.
• Monitor engine, machinery, and equipment indicators when vessels are underway, and report abnormalities to appropriate shipboard staff.
• Maintain electrical power, heating, ventilation, refrigeration, water, and sewerage systems.
• Record orders for changes in ship speed and direction, and note gauge readings and test data, such as revolutions per minute and voltage output, in engineering logs and bellbooks.
• Perform and participate in emergency drills as required.
• Maintain complete records of engineering department activities, including machine operations.
• Start engines to propel ships, and regulate engines and power transmissions to control speeds of ships, according to directions from captains or bridge computers.
• Monitor and test operations of engines and other equipment so that malfunctions and their causes can be identified.
• Maintain and repair engines, electric motors, pumps, winches and other mechanical and electrical equipment, or assist other crew members with maintenance and repair duties.
• Perform general marine vessel maintenance and repair work such as repairing leaks, finishing interiors, refueling, and maintaining decks.
• Operate and maintain off-loading liquid pumps and valves.
• Clean engine parts, and keep engine rooms clean.
• Supervise the activities of marine engine technicians engaged in the maintenance and repair of mechanical and electrical marine vessels, and inspect their work to ensure that it is performed properly.
• Order and receive engine room's stores such as oil and spare parts; maintain inventories and record usage of supplies.
• Act as a liaison between a ship's captain and shore personnel to ensure that schedules and budgets are maintained and that the ship is operated safely and efficiently.
• Install engine controls, propeller shafts, and propellers.
• Fabricate engine replacement parts such as valves, stay rods, and bolts, using metalworking machinery.