Mechanical Engineer Mechanical engineers are problem solvers who apply their skills to design, develop, build, and test all sorts of mechanical devices, tools, engines, and machines in just about every type of industry. As a mechanical engineer, you’ll work on teams to develop a wide range of products and systems including, transmissions, engine parts, aircraft engines, control systems, prosthetic devices, disk drives, printers, semiconductor tools, sensors, gas turbines, wind turbines, fuel cells, compressors, robots, machine tools, space shuttle vehicles, turbines, pumps, power plants, factories, and more.