Hi Jumpstarter - you have an unusual background for sure! But that can be a great benefit if you become a teacher, you'll be able to relate to your students. We've actually helped people get into some PhD programs including for accounting. It's been awhile since we focused on the accounting profiles but in past years, the GRE was preferred over the GMAT at some places. Make sure you research your target schools carefully to see which test they want. If you have done a Master's thesis then it will help your application considerably. Your academic references are also going to be very important. Getting that TA will be of benefit as well.
The different schools all have a different focus and you may run into trouble if you are talking too much about research AND teaching - usually one or the other is what a particular program cares about. This needs to be handled carefully and you should do a lot of outreach to the target schools to learn as much as you can about them. Also start reading the relevant academic journals and make sure you know how your industry works, who the stars are, the leading topics of the day, all that.
In terms of which program, we do know a little about this but we're not the experts. If you have questions we're happy to offer any input we can based on our past experiences with applicants like you - they don't come around all that often so we don't have a huge dataset to draw from but we do know a bit! Good luck, this is exciting stuff.
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