Mechanical engineers primary duties are to planning and design different tools, engines, machines, and other mechanical equipment. They also oversee installation, operation, maintenance and repairs of equipment. Mechanical engineers require several years of work-related experience, on-the-job training, and/or vocational training. They earn approximately $42 an hour, and the need for such workers typically grows at an average rate, from about 5% to 9% per year. Positions related to mechanical engineers include aerospace engineers, electrical engineers, electronics engineers, photonics engineers, and manufacturing engineering technologists.