I interviewed at Greenback Expat Tax Services (New York, NY)
Interview
They will give you 5-mock returns to prepare using proseries software. They will give you an intro mini quiz to get started. Demonstrate your good with technology. Customer service is very important.
Interview questions [1]
Question 1
Prepare to answer questions about US Tax Treaties such as totalization agreement. KNow tax forms 1116, 2555 and FBAR