Mechanical engineering is the science of designing, developing, and creating mechanical systems. Mechanical engineers make devices like engines, generators, turbines, refrigerators, elevators, robots for manufacturing, tools, and many other types of mechanical equipment. Mechanical engineering is one of the broadest fields of engineering. Entry-level jobs in mechanical engineering require a bachelor's degree, and many higher-paying jobs require advanced degrees. A mechanical engineering degree will open up a wide variety of opportunities for you.