Hi there,
Thanks for sharing your information. Given your goals and your current situation, have you considered going after a part-time MBA? Further, you might want to consider
Booth's Civic Scholars Program. Your age might be a bit of a hurdle, however we can help you pull together a strong story to overcome this based on your other strong qualities in your application. Your academic profile suits you for top part-time programs, so I think you're good there unless you feel you can drastically improve your GMAT. I like your involvement - we'll need to highlight your impact here.
Hope this information helps. Feel free to get back to us with the answers to the above questions. Also, feel free to check out
our free resources to get you started. Best of luck!