I applied online. The process took 4 weeks. I interviewed at OHB System (Bremen, Bremen (Germany)) in March 2017. After an online application I was invited to an interview. There's is a person from HR present and a department head/project manager. First HR presented OHB-System. Than they requested me to present myself. Starting from my education I talked about my work experiences. After the interview they move to another room to discuss some preliminary feedback, afterwards the HR persons comes back to give you feedback.