We're problem solvers. Usually the solutions make use of computers, and pretty much always make use of math. We've learned to operate in a lot of problem domains. Usually the math is pretty similar, and the computers are almost always similar. We work with the Subject Matter Experts in each domain, but if you are optimizing a function, it doesn't matter if the goal is to minimize the amount of fuel a rocket burns or to maximize the number of shoes sold; the math is the same. What does matter is whether the function is discrete or continuous, how noise effects the outcome, etc. It also matters that we work very closely with the Subject Matter Experts to understand the problem and make sure that we are solving the right problem.