Hi all. Wow! I'm blow away by the wealth of responses this post has gotten. I truly appreciate all of you sharing that knowledge. I especially appreciate the separation of disciplines that have been explained.
I think I would probably fit more into the AI Engineer category since I would have to do a lot more study for AI research, but I do enjoy trying to use existing models and libraries to accomplish tasks. I can also create toy models myself (I actually built a ConvNet in PyTorch to detect popup dialogs on my screen and alert me), but I'm no where near good enough to create entirely new novel approaches or architectures.