Application is always through the online portal. Received an email inviting me for an interview within 2 months of applying. Interview was arranged to be via Webex with three member of the panel in Washington DC and a member was in the Country Office (CO) where the position is located. Eventually had the interphone over the phone as I was in a conflict affected zone with poor internet network. Every member of the panel asked questions. The panelist in the CO asked non-technical question.