Had 2 interviews. The first was with the hiring manager and second was with the hiring manager and panel of engineers. 1) First interview was fine and I was able to answer each question well. However, the interview ran longer as the hiring manager seemed to want to question my abilities and was hesitant due to years of experience. The job says 10 years but I had a little less than 10. I was moved to the next interview. 2) Had a second panel interview with a team of engineers and the hiring manager. The team of engineers were nice and the questions weren't complicated, just asking what I've worked on and what experience I have in the standards. It seemed positive and the interview was coming to an end. However, the hiring manager begins to speak and is unhappy and begins to interrogate me. He began questioning my abilities once again and his tone got noticably more irritable. I wasn't left with any time for my own questions. Not a great experience with the manager, not sure why he'd move me onto the next interview if he was going to be unhappy.