Very structured. 8 (plus 1) questions with hiring manager and Senior Civil Engineer rotating. Would repeat question once but not elaborate. Followed up the same day, a week later with additional information, and once again the following week without a response. Received notification that I was not selected via USAJOBS.gov. I don’t think I’d ever apply again because I found it disrespectful that I didn’t get a personal email or phone call rejection. In my years of experience with interviewing people and being interviewed it is common curtesy to notify all interviewees the outcome, especially when they follow up.