I am interviewing for a position as an assistant to an agent at a talent agency in Hollywood. I got past the first interview and was asked back for a second one with the agent himself. I didn't bring up the visa issue because the HR person did not ask me about it. I am currently on an OPT until next May and so I checked the box that said I was authorized to work in the US. I'm contemplating whether I should wait until they offer me the job to tell them about my status or to do it before then. I'm concerned that this will hinder my chances, as most of them seem reluctant to hire me simply because of my immigration status. What should I do?