A mechanical engineer https://onlinefreelancejobs.net/mechanical-engineering-job/ is someone who uses science and math principles to create machines, tools, and structures. These professionals solve problems in a wide variety of industries, and often work in factories. Their work includes designing machinery and studying current products to discover how they can be improved. Then, they use computer-aided design (CAD) to create a final design. They also manage and coordinate projects, estimate costs and delivery dates, and write technical manuals.