I applied through an employee referral. The process took 2 weeks. I interviewed at Clear Channel Outdoor (Arlington, TX) in Mar 2013
Interview
It was great, easy and well prepared. The interviewers were very professional. I met with both designers and art directors and it was a very comfortable setting. I didn't feel nervous at all, the interviewers were extremely relaxed and made well thought out questions.
They asked about some situational questions. Also basic questions about my portfolio and my works, and experiences. About after a week and less than 2 weeks got a decision email.