Fernando Sepulveda was a Starfleet officer in the 24th century.
In 2353, he was listed as a Starfleet Operational Support Services officer on a directory placard in Starbase 32, Maxia sector. His room number was #75274. (TNG: "Violations", directory)
In 2367, as a lieutenant, he was the ops engineer for the Third Shift Antimatter Operations Unit on the USS Enterprise-D. He was listed as being an Ops Engineer on duty in the Engineering Division duty roster. This roster was on display via the desktop monitor in the ready room. (TNG: "Suddenly Human", okudagram)
In 2372, as a lieutenant, he was listed on the Planetary Geosciences Division duty roster aboard the USS Voyager. (VOY: "Parturition")
This character was only mentioned in writing.
He was named after swing gang member Fernando Sepulveda.