A Mechanical Engineer researches, designs, develops, tests, and oversees the manufacturing and installation of mechanical devices and systems, including tools, engines, machinery, and HVAC systems. They apply principles of mathematics, physics, and materials science to solve real-world problems, improve existing products, and create innovative solutions across diverse industries like automotive, aerospace, energy, and manufacturing. Key duties involve creating designs using CAD software, developing prototypes, analyzing performance data, and ensuring products meet specifications, safety regulations, and efficiency standards.