I applied online. The process took 1 week. I interviewed at World Food Programme (Nairobi) in May 2024
Interview
The aptitude test was a bit of work but with good preparation you can get through the first test phase. Be knowleadgeable about the windows system and have some experience in the Tech field.
The process was a streamlined and some of the questions are what I had learned in school so I was able to remember most of them. But what is mostly required is to have courage and to make sure you don't give them a reason to suspect you.