Mostly informal. The drawings I had to review were very basic and I was surprised that no one had any actual construction (real world ) experience. It is not difficult to have a favorable interview when your field knowledge trumps office knowledge. The people were very pleasant, but not very knowledgeable in design processes, project planning or execution. It was most surprising that no one had any field construction experience - nor are they interested in gaining this experience, even going so far to state it is not necessary. They are too comfortable with the office, climate controlled environment. For someone with both design and construction experience the interview process is going to be easy.