Ensign McCauley was a 24th century Starfleet officer assigned to the duck blind mission on the Ba'ku planet in 2375.
McCauley and fellow officer Gilles were assigned to assist the edaphology team in area 7, moments before the disturbance caused by Lieutenant Commander Data, following a malfunction he suffered after he was fired at by the Son'a. (Star Trek: Insurrection)
This character was only mentioned in dialogue.