Is your pro graphic designer putting this into a Vector format? Or just putting it into something like Photoshop.

A Vector logo is what you need.

Keep your colors to a minimum. Looks like the two most used colors are Yellow and Black, which is fine.

I think the hand drawing looks awesome.

It will be much easier to manipulate and change colors around once you get it into a program designed for such things, such as Illustrator...

Good luck with it. I think it's looking nice so far