From Halopedia, the Halo wiki
United Nations Space Command
Brewer was a scientist on a team conducting research at the Henry Lamb Research Outpost on the surface of Installation 00. In early 2558, he took a liking to the newly-installed logistics artificial intelligence, Isabel, and was caught swapping jokes with her by Nathaniel Palmer. This was notable, as Nathaniel had pegged Brewer as the most jaded scientist there.