Mechanical engineering is one of the oldest and broadest engineering disciplines. It deals with designing and producing tools, machines, and mechanical equipment for various industries. A mechanical engineer works on projects ranging from small tools to large machines like jet engines. Mechanical engineers can find work in laboratories, construction sites, and nearly every production company since mechanical devices of all kinds need their expertise. The field involves design, operation, maintenance and manufacturing processes for machines and their components. A bachelor's degree in mechanical engineering is required to become a mechanical engineer.