Sentence Comma Usage

I'm trying to improve my grammer, especially the comma. I frequently write sentences like this:

If you move to a R&D Engineering role or a IM Specialist, then the new role will most likely void the pending xyz application, and will result in you starting the process all over again.

Is it permissible to place a comma after application? Because I write sentences like this all the time, any assistance would be appreciated.

[Tdol]

That's an optional comma- some would use it and others wouldn't. If there are two independent clause or if the second is less important, then we generally use a comma. Here it's not independent, so it's up to you to decide according to how important you see the second part.

[bphillips]

I noticed that you misspelled grammar; you spelled it with an "er". This is a good time to learn the correct spelling for a commonly misspelled word. :)

[misscarlas]

what does R&(something I couldn't remember) and xyz application means?