The process took 3 months. I interviewed at Gates Foundation (Seattle, WA)
Interview
Same process as described by others, informal interview (telephone) with HR (senior recruiter), informal interview (telephone) with team lead, flown out for one-day interview with 7 members of senior staff, one-on-one interviews, on the hour, every hour. It is a long day but I enjoyed the opportunity to have one-on-one with different individuals as opposed to a pane.
Interview questions [1]
Question 1
What do you bring to our team of experts, what would you change about this organisation, why do you want to work here.