Mess Hall
The above notes Wierzbowski's general position throughout the entire breakfast scene. His back is sometimes visible during the Ripley/Bishop dialogue at the far table.
At the moment when Ripley knocks the tray out of Bishop's hand, and we have several quick reaction cuts, there is a ~10 frame cut to the side of the table where Wierzbowski sits, where he is up close and personal, and impossible to miss (aside from the shot only being ~10 frames long).