C. Petrus was a member of Starfleet in the 22nd century.
In January of 2155, Petrus worked in Propulsion at the Fleet Operations Center on Earth. Petrus' office was located in room 4227. (ENT: "Demons" set artwork)
Petrus' name was seen on directory listings seen on the set of "Demons".
C. Petrus was named after Enterprise visual effects assistant editor Chris Petrus.