Invitation to come on site, usually following scenario: - typical interview conversation: previous technical experiences, how to handle difficult situation or high pressure, it is a customer focused job so how does one ensure customer is still satisfied despite tough situation. - applicant is given a task to present the function of a filter with housing. Interviewer gives datasheet and props, Applicant has time to read through and then present it like a sales pitch. Interviewer asks few questions , some more indepth to the function , some more general . - post interview there is sometimes introduction to the team where applicant can ask questions to future colleagues.