Fascinating background. Honestly, your profile is very strong -- the only weakness is your GPA, but I think if you address that and explain what you explained below in an optional statement you'll be fine. If you take a supplementary course as well, you should be covered.
I think you've got a great shot at top 10-15 programs! In more detail:
Academics: strong GMAT. Weak GPA, but as discussed above, can be overcome.
Professional: really sounds like you've got strong leadership capacity and stories to support that claim. The fact that you take charge within your function, are a team lead, and have set up a new program is great. It's icing on the cake that you also demonstrate firm stewardship by serving as diversity officer, etc.
Extracurricular: marathons, teaching, involvement with your undergrad --- all good stuff. You're clearly an active and engaged leader in your community.
Best of luck,
Read the mbaMission Insider's Guides
(16 individual school titles)
Download mbaMission’s Free Personal Statement Guide
Visit the mbaMission Blog