An initial phone call with HR, and the another phone call with the hiring team leader. After that there were in person interviews- first with the hiring team leader, then the hiring manager, and then a final in person interview with HR

They tried to see my prior knowledge and experience as a system engineer. They went over my previous working experience, and tried to understand if it can assist in the proposed job. It took about an hour, where a major part was not technical at all, but rather "get the idea" of who I am. I had a short written test (which I was asked to write down a couple of things).