In the Season 3 Finale of The Office episode "The Job", Michael, Karen and Jim (and we later learn Ryan) all apply for a job at corporate. When Jim is in his interview, its clear that David Wallace is impressed with him and Jim seems to interview very well, but also appears to make the decision to dump Karen and finally date Pam while he is in the interview.
We see him find Pam's note to him and talk about how much he appreciates the friendships at the Scranton Branch and then it cuts to him driving alone and then we see him back at the office in Scranton asking Pam to go to dinner with him. Did he leave Karen in New York? That's a different question of course and not what I'm asking here.
What we don't see is David Wallace ever offering him the job. I got the impression that he was offered the job but turned it down so he could stay in Scranton and date Pam, and so they offered the job to Ryan because he was the only choice left. Is there any evidence that Jim was offered the job? Was it ever mentioned later in the show or in an interview?