According to his high rank, we must assume that he wasn't aboard the ship when it was stranded in the Delta Quadrant. He may have been assigned aboard during the test phase of the ship like Cmdr.Rick Berman and Cmdr.Jeri Taylor who were also listed on the dedication plaque. Another explanation could be that the crew manifest was deliberately falsified in order to disturb aliens who tries to scan the database or board the ship, which could explain the use of the people on the dedication plaque with ranks that obviously are doubtful.
It seems rather odd for him to have such a relatively low rank after almost 80 years of service, but it is possible that he was a "Commander, Starfleet" and held an admiral grade.
Speculative/opinion — Morder (talk) 23:04, October 27, 2009 (UTC)