One way video interview with Hirevue. Did not talk to a live person. Fairly standard interview questions with a couple of minutes to record yourself providing an answer. Got rejection letter over email.
I applied online. The process took 6 months. I interviewed at NATO (The Hague) in Nov 2022
Interview
Hirevue virtual interview followed by a topical written assessment and formal interview with several staff including impartial panel members. Overall, not difficult, but competition is high so tends to attract strong candidates.