Thanks for the detailed info. I think that based on where you academic profile stands right now, it would be difficult to get into an M7 school. A 600 GMAT is quite low for these schools, and your undergrad scores seem somehow low/average as well. It's not to say you can't overcome that (obviously if your score improves drastically, my response could change), but your academic profile and age are definitely two weaknesses in your profile today (can't do anything about age, just need to be aware of it!).
Your professional experience is fine - you've got some grounding in finance, so that will help your career narrative out. Still, it really depends on how well you are able to demonstrate your leadership and teamwork capabilities, and I worry that the nature of your role is more analytic and less collaborative. I could be wrong, but if that's the case, it will be difficult to demonstrate leadership on the job.
Extracurriculars: seems like you are pretty actively engaged outside of work. Perhaps this is an area for you to show leadership (do you hold leadership positions in any of these organizations, etc?) Either way, they will add multi-dimensionality to your profile.
Community: I'm not sure the nature of your post-college community work. Seems that you've done quite a bit of volunteering, but again, you'd want to show leadership potential through these activities if possible.
All in all, I think M7 schools are going to be a bit of a stretch. I'd suggest that you focus on improving that GMAT score first and foremost, and then spend a lot of time thinking about how you will show your leadership capability in your applications. If your score improves drastically, perhaps you can put one or two of these schools on your list. Otherwise, I would aim a bit lower.
Hope this helps,
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