Dick Brownfield was a Starfleet officer in the 24th century.
As captain, he was listed as a Fleet Yards Operations officer on the dedication plaque of the USS Brattain. (TNG: "Night Terrors", dedication plaque)
In 2353, he was listed as a Starfleet Operational Support Services officer on a directory placard for Starbase 32, Maxia sector. His office was located in room #43964. (TNG: "Violations", directory)
In 2365, he was listed as the commander of the Federation starship USS Atlantis on the Starship Deploy Status chart in the Starbase 173 courtroom. (TNG: "The Measure Of A Man")
In the 2370s, he was listed as a Research and Development officer on the dedication plaque of Federation starships. (VOY: "Caretaker", dedication plaque; VOY: "Message in a Bottle", dedication plaque)
This character was only mentioned in writing.