US IRS Publication 54

I will be relocating to the UAE in August and am working to hire US teachers for the school I will be at.  A question that comes up from most people I talked with was regarding the filing of US taxes.  I am not an accountant and am not offering tax advice in any way...but IRS Publication 54 outlines all of the details for US citizens living abroad.

What are the qualifications you require and what subjects or specialties are you looking for ?