30 min phone call interview: To get to know the candidate better and very basic process engineering questions. Assessment centre: two day assessment centre, plant tour, 15 minute technical presentation to roughly 15 people, then a group exercise on day 1. Day 2 consisted of three different interviews, probably a bit over the top. Very tough competency questions. Wouldn't bother applying if you have no experience.

Initially submitted a CV recruiter booked a 45 min interview with two senior managers asked technical and competency based questions . Then after two weeks HR contacted to move me to the next stage where I stayed a night in hotel the interview was a 2 day process the first day a presentation on something I had a technical role in and second day 3 , 1hour interviews on competency , technical and motivational fit for the company and a site tour then HR got back with a final response after two weeks .I did think the process was a little over the top