Your WE will be a tough sell for MBA programs, although your academics and GMAT are good. Most b-schools are going to want to see an intentional, progressively responsible career track with an average of at least 3 years. Sounds like you had a pretty underwhelming experience at the bank which would not likely translate into an impressive story plus working part time on the most recent side will be viewed as going in the wrong direction. Since you did not list your post MBA goals, I will assume you have not put too much thought into them, which will be a big red flag for MBA programs. In fact, being able to articulate a clear and compelling vision for your future and how what you have done in your past has laid the right foundation for that future is one of the most critical parts of a winning application.
What is it that you want to do? If you don't have all these answers, perhaps the MIM is a better choice. They will still want to hear your plans, but won't be nearly as critical of your work history nor how many years you have been working professionally. They will be more concerned with your academic record and why you want to pursue the MS degree.
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Bryant Michaels
Admissions Consultant