I have many older students in my classes (often called non-traditional students). Age has not hindered their ability to get jobs. You bring your education and experience to the interview table, even if your experience isn't necessarily related to engineering. I also find non-traditional students tend to be very motivated and really value their education, so I enjoy having them in my classes.
If you have thoroughly done your research, really know what you're getting yourself in for (both in the schooling aspect as well as what engineers do day-to-day), and can't imagine doing anything else, go for it!
If you think you should do it because engineering pays well and that is the main reason you're interested, you should reconsider. I've seen a lot of students who thought they wanted to be engineers because of the money. Most of them worked only a few years as engineers but ultimately left engineering because it isn't what they expected. They weren't usually very good at their jobs, either. Also, if you don't have a passion for life-long learning, you may want to choose a different field. The rapid pace of changing technology means rapid self-education is often necessary as an engineer.
One last note: don't expect engineering education to give you an accurate picture of what you'll do as an engineer. Most engineers will tell you that school is very different. I encourage my students to work as technicians/trades workers while going to school because they learn how to construct/maintain the things that engineers design. This makes them better engineers in the long run, in my opinion. Schools teach mostly theory, and many college graduate engineers find themselves in deep water after school because they know the mathematics but not how parts fit together, or can't read/create real engineering drawings, or don't know anything about codes and standards. Some swim; some sink. (By the way, I teach part-time so I can introduce students to real-world engineering design before they graduate. When students interviewing bring a real-world design package of a system that they created, drew in CAD, then built to code and tested, employers salivate.)
Best of luck!
xnuke
"Live and act within the limit of your knowledge and keep expanding it to the limit of your life." Ayn Rand, Atlas Shrugged.
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