I applied online, directly through the PKI website listing; the team lead reached out for an in-person interview a few days later (though we wound up conducting the interview virtually), and we set up a time for the following week. The team lead and a senior specialist acted as interviewers and were overall very sweet and easy-going -- at the start of the interview, the lead even insisted that we treat the process as a conversation rather something formal and rigid. Fine on paper, but in practice meant that a significant portion was their bantering together (which I didn't mind) and at times cutting in with comments that prevented me from finishing my answers (...minded this a bit more). The questions themselves were primarily culture fit/behavioral or questions about previous research experience. Was ghosted.