I applied online. The process took 2 months. I interviewed at UNICEF (New York, NY) in Sep 2015
Interview
Short phone interview, very easy. Next stage was a quite technically challenging times written test. The the final 3 were invited for a skype panel interview.
Study the UNICEF competency framework closely, linked to the position. All of the questions were taken directly from the competency guide
Interview questions [1]
Question 1
All questions directly from competency guide available online