I'm only an ME undergraduate right now, but I'm pursuing this path that may lock me in industry (CAD/CAM/machine design/etc.) for a minimum of 3 years after graduation. It's not quite the technical path that I wanted to go into, but the opportunity seems too great to pass up for now. How feasible would it be to go back into graduate school to get a Masters and/or PhD after 3 years of being away from the more (for lack of a better phrase) math-intensive areas of Mechanical Engineering? I don't want to end up doing machine modeling & design for the rest of my ME career; I'd rather do HVAC, robotics or materials research. But the fact that I'll be doing none of those things for 3 continuous years right after getting my Bachelor's worries me. Any advice?