I had a job as HVAC engineer for the upgraded Oslo Airport back in 2011; started doing HVAC work for 3 weeks the rest was programming trying to make the rest of people more efficient. Made an Excel sheet with a lot of macros to manage all the drawing of the airport. That’s why I switched to programming when I continued to study, and did not want to come back before I got more experience.
They even gave me a big desk at Trondheim/Tyholt so I could help them with the software during my studies.
For what it's worth I found Oslo Airport to be one of the best airport experiences I've ever had. 5 stars.