But he wasn't O'Brien. He is listed in the credits simply as "Conn officer," and Colm Meany has said that the script described his character as "ND" -- "non-descript." A few episodes later, Meaney shows up as a security guard. There was no Chief O'Brien until season two's "The Child." "All Good Things" retroactively made the Farpoint character O'Brien, but no one created a character called O'Brien for Meaney to play until season two.O'Brien was in Encounter at Farpoint.
He predates the LAST administration.
I think that in retrospect we chalk that up to continuity errors. There were enough weird costume irregularities in TNG's early years that the writers can claim that it was the same character, even if it really wasn't.
Hell, it took a few seasons before the costume department decided what rank Tuvok was on Voyager.
As for Tom, I wish that he had been that character from "The First Duty," because his backstory, which beyond being vaguely referenced, was never fleshed out sufficiently. I liked the character, but he was never more than just affable guy who's a pilot.