The mess officer was a position on board Constitution-class starships, responsible for activities in the mess hall. In 2269, Briel held this position aboard USS Enterprise. On Stardate 5577.3, she frantically called security to report the seeming growth of all objects in the mess hall, including tables, chairs and silverware. She also reported that women were losing rings and hairpins, and that some were panicking. In actuality, all organic materials, including crew members, were shrinking due to their exposure to spiroid epsilon waves. (TAS: "The Terratin Incident")