Hi Oye,
Unfortunately there really isn't much information here for me to work with. While GMAT is not the only factor in admission it is an important one in forecasting what tier of school you should be looking at. Additionally you will need to concentrate hard on your goal statement -- the leap from engineering to politics is quite non-traditional and the schools are going to want to see evidence that you've thought this through and can explain why it works for you, and how an MBA will help with your ambitions. There could also be some valuable content in your startup and volunteer work -- and potentially more leadership evidence here than your current job calls for. If you want to write back with some more details -- and perhaps some ideas of what schools you're thinking about or even what part of the country/world appeals to you, I'd be happy to try and elaborate further.
Best of luck,
Daniel Richards
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