A Mechanical Engineer is a professional who designs, develops, and tests mechanical systems and devices. They apply principles of physics and materials science to create machines, tools, and engines used in various industries, including automotive, aerospace, and manufacturing. Their work often involves computer-aided design (CAD) software to create detailed models and simulations. Mechanical engineers also focus on improving existing technologies and ensuring that products are efficient, safe, and reliable. They collaborate with other engineers and professionals to solve complex problems and may be involved in project management, research, and development to innovate new solutions in their field.