I love your background in karate... Be sure to emphasize this in your applicatoin -- both what you have accomplished and WHY you are passionate about it.
But a challenge for you will be showing a clear career progression. To be frank, it sounds like you have bounced around from job to job. While job changing by itself isn't bad in adcomms' eyes, moving around without making real progress is. So, be sure to emphasize specific examples of achievements on the job, to show how you made a real impact at each job.
Also, be clear on why you want an MBA, and why you want it now. 32 isn't too old to get an MBA, but it's older than average, so adcomms will look closely for your reasons for wanting an MBA now.
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