The next time you're in an airport riding a moving walkway, buying a sandwich, or waiting at the gate, look around and take a moment to appreciate the airport engineers who helped design the space. These building whizzes, who need at least a bachelor's degree in engineering and a special license, use their smarts to plan and oversee construction in airports. To do this they've got to consider all kinds of things like safety of all using the space, practicality (can people move easily from the security line to the gate?), and even environmental issues like whether the soil below the terminal is strong enough to support the foundation. They also work on outdoor areas such as runways and parking areas. Once they've made their plan, they oversee the contractors and workers doing the construction. Unlike engineers who work on more traditional buildings, those at airports face unique challenges because they're working in a space where planes are taking off and landing regularly, and they must follow strict government safety regulations. But if you're obsessed with planes and airports, it's a great way to become an essential part of this world.