Doug Dean was a Starfleet officer in the 24th century.
In 2354, he was listed as a Starfleet Operational Support Services officer on the directory placard at Starbase 32, Maxia sector. His office was located in room #35951. (TNG: "Violations", directory)
In 2363, as a captain, he was listed as an Orbital Operations officer on the dedication plaque of the USS Phoenix. (TNG: "The Wounded", dedication plaque)