Thanks for posting. Regarding the schools you have listed, although nothing about your story makes me think there is any reason why you cannot be admitted, nothing stands out telling me why you should be admitted. I do recommend you take the GMAT again. The reason is that your highest score is self-reported on your application, so admissions teams will focus on your best score. For this reason, it won't hurt your application if you receive a lower score on your second attempt. To an admissions team, improving from a 690 to a 730 can make a difference, particularly given the competitive programs you are aiming for.
For how to improve your candidacy, I recommend you look for ways to make an impact outside of work, perhaps through extra-curricular activities. Also do not discount the other areas of your application, as the reasons why a top program would admit you are in the details of your work experience, personal experiences, personality, values and overall story.
Here is some school specific advice for the programs listed:
Wharton: http://www.stacyblackman.com/business-s ... n-wharton/
Sloan: http://www.stacyblackman.com/business-s ... mit-sloan/
Kellogg: http://www.stacyblackman.com/business-s ... n-kellogg/
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