I was contacted by a recruiting agency and then an interview was set up with the company through them. I went to a tech school, and the recruiter got my information from the school HVAC program. Before the interview the operations manager called me and talked about the job. He asked me a few questions. They were ones like, "If a room is warm, what does the VAV box do?" The face-to-face interview was pretty much a job description instead of many actual interview questions. I did get asked if I have ever set up a home router before, what my favorite courses were, and I believe there were some strengths and weaknesses questions too. I also had to take a short written test at this branch. It was Ohms law stuff, pointing out devices on AHUs, and writing the units of relative humidity, CO2, Etc.