After Trek: "at"
Dick D'Angelo was a 24th century Starfleet officer.
In 2353, D'Angelo was listed on a directory placard as having an office in room 75274 on Starbase 32. (TNG: "Violations", directory)
In 2367, Lieutenant D'Angelo was an Ops Engineer for the Third Shift Antimatter Operations Unit on the USS Enterprise-D. He was listed as being 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)
Furthermore, his name appeared in the USS Voyager crew manifest, retrieved from the computer in 2371. (VOY: "Projections")
In an alternate future, D'Angelo was listed as a Starfleet Tactical official on the dedication plaque of the USS Pasteur. (TNG: "All Good Things...")