What your asking is pretty much what I did. at 28 I was tired of my civil engineering work. I started taking grad classes interned at IBM. I ended up getting a masters in CS. I was at a start up in my last year of grad school that ran out of money, so when the chance came up to work on a radar project that had 6 years of funding, I did that. The internships that a school can help you get is probably the biggest help. I ended up working on operating system stuff for my first post grad school job, so those classes were very useful. Now I'm leaning on my database and algorithms classes for my work. Big companies like the degree.

Go for it.