At your age, it shouldn't be a major issue outside of H/S/W.
What is more a concern is whether you can stand out in a sea of other engineers. You mentioned you have strong extracurriculars - but they are all in college (which in your case will work against you because you're already 7+ years removed from your college days, and some of those experiences could very well be 10 years old if they were in your undergrad years).
The general rule of thumb (again it's a guideline, not a hard rule) is to focus your essay material on stuff that you've done within the past 3-4 years. For some folks that could mean college (i.e. the younger applicants), but for many applicants it means focusing on work-related material and any extracurriculars they've done after college.
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