<p>I have worked with a couple of engineering/business double majors, and have yet to see ANY of them make a real contribution as an engineer. Every single one wound up on the business side, working in jobs where technical knowledge was useful but not necessary - most of their peers are straight business majors.</p>
<p>If you want to be an engineer, study engineering, take a couple of business courses so you understand that side of things, and then go be an engineer. There are massive, effective structures in place to turn good experienced engineers into entrepreneurs and managers once you are ready.</p>