There are several types of engineers beyond the traditional mechanical engineers and electrical engineers that most people think of. Aerospace engineers work on aircraft like planes, helicopters, and rockets. They can even be valuable in automotive engineering for their expertise in aerodynamic designs that improve energy usage and speed. They generally have at least an undergraduate degree in mechanical engineering. Like many other engineering disciplines, they can take the Fundamentals of Engineering exam and working with a licensed Professional Engineer to obtain their own Professional Engineer license. Aerospace engineers are often heavily involved in analysis with simulations involving fluid dynamics and finite element analysis. Aerospace engineers are abundant in the defense industry.