I applied online. The process took 4 weeks. I interviewed at World Bank Group (Washington, DC) in Jan 2010
Interview
I learned about the position from the career center at the University. The job offer was not posted on the website of the World Bank and I had to send an email directly to my future supervisors. Soon, I received a phone call to schedule an interview. I had a quick 20 minutes interview with 2 supervisors and 2-3 weeks later I was offer the position.