Bob Blackman was a Human Starfleet officer in the 24th century.
In 2354, he was named as a Starfleet Operational Support Services officer on a directory placard in Starbase 32, Maxia sector. His room number was 83412. (TNG: "Violations", directory)
In the 2370s, he was named as a Yard Engineer on the dedication plaque of Federation starships. (DS9: "The Search, Part I", Defiant dedication plaque#USS Defiant (NX-74205); VOY: "Caretaker", dedication plaque; DS9: "Valiant", dedication plaque; VOY: "Message in a Bottle", dedication plaque; DS9: "The Dogs of War", dedication plaque)
Blackman, who was listed on various pieces of background artwork, was named for costume designer Bob Blackman.