A mechanical engineer applies math and science principles to develop and create technological solutions for societal needs. Their designs involve the efficient use of energy, force, and motion. They use these principles to produce new products, improve existing ones, and develop new solutions to human problems. Their designs include everything from automobiles to medical devices. The job description for this field varies by industry and business. For more information, visit mechanical engineering https://onlinefreelancejobs.ne....t/mechanical-enginee jobs.biz. Let's look at some common job titles in this field.