Mechanical engineers can work in a multitude of industries and sectors which involve the conception, fabrication, and utilization of mechanical systems and devices. Examples of these include the automotive industry, where they can design and refine engines, transmissions, brakes, suspensions, and other parts of cars, trucks, motorcycles, and other vehicles. In the aerospace sector, mechanical engineers can design and develop aircrafts, spacecrafts, satellites, rockets, and missiles that fly in the air and space. Likewise, in the energy sector they can design and optimize power plants, turbines, generators, and renewable energy systems that produce and distribute electricity. Mechanical engineers are also necessary in manufacturing to create machines, tools, equipment, and processes that produce various goods and products. Additionally they are vital in the biomedical field to design artificial organs, prosthetics, implants, and medical devices that help improve the health and quality of life of patients. These are just a few of the many opportunities available to mechanical engineers. There are numerous other fields such as robotics, nanotechnology, defense, entertainment where their skills are required. Moreover mechanical engineers have the option to pursue further education or research or even start their own businesses or consultancies.