A marine engineer works to ensure the smooth operation of a ship or other water vessel like a ferry, submarine, or cargo ship, by inspecting and performing maintenance on propulsion systems, engines, and other systems powering the vessel. You may also design and build these systems. You can choose to specialize in one area such as boat engines. In this job, your duties may include performing maintenance work on boats or designing propulsion systems with CAD software on a computer. Communication skills are crucial, as you are constantly discussing needs and expectations with your clients. Additional responsibilities include keeping a timeline and budget, ensuring that your projects stay on track.