J. Fernandez was a member of Starfleet in the 22nd century.
In January of 2155, Fernandez worked in Communications at the Fleet Operations Center on Earth. Fernandez's office was located in room 1180. (ENT: "Demons" set artwork)
Fernandez's name was seen on directory listings seen on the set of "Demons".
J. Fernandez was named after Enterprise assistant director J.C. Fernandez.