I interviewed for a GMP operator. Interview was split between 4 sections: 1. with HR 2. Arithmetic based test (30 mins) 3. GMP Production manager along with 2 Senior scientists 4. Head of Production. Interview lasted about 2hr 55 mins and this was followed by a 15-20 mins tour of their clean-room production facility (Downstream processing, specifically). The interview was intense with many subject based questions around cell culture, GMP, microbial fermentation, and down stream processes including plasmid purification. HR interview section is mainly get you to calm your nerves down and get in the interview mood. GMP manager and Senior scientists are there to test your competence and specific skills and experiences around the role; they put you under pressure to see how you could endure the seemingly never ending questions. Head of production was like a psycho analyst who want to know your commitment, knowledge around industry and possible long term goals. Tour guides are fun and help you learn more about the kind of work they do there and how they find working at the place; don't ask too specific questions and the products they produce or the cell lines they work with because they'll tell you that sensitive company information. All interviewers were friendly and showed interest in the process, but also with a commitment to absolutely test your competence around the role.