I had a half-hour interview with the interviewer that came to my school. It was mostly casual, asking me about my interests, generally looking at my resume. Then, I was invited to the national-level recruiting interviews that lasted half the day. The day included three 45min interviews and one 45min writing session. The three interviewers were managers at different offices across the country. Two asked general behavioral questions like, "Name a challenge you have faced" and "What role do you play in a team". One asked more technical questions like "Describe some air pollution control technologies".

Following an on-campus visit, we arranged an in-person behavioral interview. I was invited to the 6-hour final round of interviews (including 45 45-minute technical writing section, and 4 behavioral interviews). I received verbal offers from two offices, and called with both regional managers. They both said an official offer would be sent to me in a week or two, but it never arrived, and I heard nothing. A month later, I emailed both managers, and I was sent a letter of rejection. This company is significantly less professional compared to other places I have interviewed at and received offers from. On top of that, they expect employees to work a minimum of 47 hours a week for very uncompetitive pay. Overall, a bad experience from a subpar company.