I applied online. The process took 3 days. I interviewed at The English-Speaking Union (London, England) in Sept 2013
Interview
There is a long list of standard questions that range from what you understand to be the purpose of the organisation to how you would structure debate projects for people with no debate experience and how to reach out to volunteers. A lot of the questions focused on organisational skills.
Interview questions [1]
Question 1
All questions were quite standard, but expect to explain the applicability of past experience.