Please help me evaluate my candidacy for MBA

You would have a much better chance if your GMAT was 720+. Also, explain "Finance" at Goldman. Accounting, or Investment Banking division?

You are Indian, therefore you have a 100% chance of being accepted to any of the above schools. Jokes aside, a ton of work for a non-profit and experience at Goldman Sachs will definitely make you a very appealing candidate. I agree with DoctorAndre though, a higher score would help.

Well, a lot would depend on the quality of your work experience: what you did, how fast you were promoted, and what achievements you have. And I totally agree with the others, that the most obvious thing to improve at this point is your GMAT, esp. since you have a few months left before the essay questions will even be released. But still, if your work experience is really strong and you write an excellent application, you might have a shot. Out of all the school listed above, I think you'd likely have the strongest chances at Oxford.

I would say that your chances are pretty weak at all of the following programs: my reasoning is that, first off you have a 670 Gmat score, which is going to be almost 50 points below the median at most of these schools, your GPA is also below the median at the schools. Secondly while your work experience is at a good company, it is in a back office function and lastly you are an orm. I would suggest adding some lower tier schools to your list.

Finance @ GS. Meaning, internal corporate finance, right?

I always find it entertaining how people ask for evaluation, and list GPA/GMAT and the name of company as though that's it. The most important piece is WORK EXPERIENCE, did you LEAD people? did you take the initiative on projects? did you ADD to the bottom line? If you did any of these things you would know where you stand in regards to your peers.