First, applicants take an aptitude test and are given an initial interview. I was interviewed in Los Angeles. The test is timed and the interview is brief and efficient.
The second interview was conducted in Roseville, CA. I live in San Diego, and Union Pacific paid for my ticket to fly to Roseville as well as my hotel fare. The interview consisted of a panel of 5 interviewers. The group was very professional and asked direct questions that seemed relevant to the position. I really like this company, felt the interview went well and like the people who interviewed me, but I was eliminated from consideration at this interview stage. I'm not sure why, but it was a good experience and Union Pacific strikes me as a very professional company.