I'm aware that a huge percentage of engineers (especially mechanical engineers) end up working in positions that require almost none of the knowledge they acquired during undergrad. I know that college isn't work, but I'm interested in pursuing a career that, at least, requires me to use some of my fluid dynamics, heat transfer, and not just do part selection. I think that the best way to achieve that would be through a Master's Degree, where I could specialize on some field and get the more difficult/intelectually demanding jobs. I'm very interested in thermal/ fluids because it's a field with applications across different industries (Oil and Gas, Aerospace, Renewable Energy...), so that would give me enough flexibility to switch fields if I need to while carrying some easily transferable skills. For instance: I'm almost sure that designing turbines for airplanes isn't that different from designing wind mills, and a good knowledge of fluid dynamics would give me the opportunity to work not only with aerodynamics, but also with pipelining in Oil and Gas. I just want some counseling, just to know if my expectations are realistic.