Fluid mechanics is a broad discipline that touches many other areas of scientific study, so the list of careers that call on the knowledge of fluid dynamics is long, including physicists and engineers. Physicists in various specifications use their grasp of the concepts of fluid mechanics, and engineers in multiple disciplines rely on their studies. Fluid mechanics is crucial to the oil and gas industries, and it's important to biology, anatomy, and other disciplines of medicine. If you're looking for a career in just about any discipline of science, you're going to need a knowledge of fluid dynamics.