Mechanical engineers are considered the “general practitioners” of engineering because their education is extremely broad and their services span many interdisciplinary technical, social environmental and economic problems. These engineers deal with a wide realm of motion, all forms of energy conversion and transmission; the flow of fluids and heat; the development, design and operation of machinery and equipment; material structure and properties; and transportation processes. Here, you’ll choose among three major areas: thermal-fluid science engineering, systems and design engineering, and materials science engineering. Your career could include research and development, design of equipment and systems, testing, plant and sales engineering, and management.