However, that doesn't mean you can't switch or add additional training. But it's one of those fields where schooling is so concentrated on one type of engineering that it's very hard to have training outside of your major.

I can major in Economics and have plenty of room for courses in marketing, finance, sociology. But with engineering, that's not the case. And it's because it's a very technical field!

Now mechanical and telecommunications engineering go have some things in common. And adding the CISCO certification under your belt would definitely help. But you'll be possibly competiting with people in computer science and networking.

The difference often lies in the design arena. That's an area that's highly stressed in engineering programs. So they often have a leg up here. In other words, engineers can design, build, and troubleshoot.