I applied online. The process took 2 weeks. I interviewed at National Conference Center (Leesburg, VA) in Feb 2016
Interview
Expect a call from HR Manager who will invite you for the interview. The first level of interviews is an interview with HR Manager, then you'll have an interview with the leader of the department and some other employees from that department.
Interview questions [1]
Question 1
Why would you like to work at The National Conference Center?