D. Mirabello was a Human Starfleet officer in the 22nd century.
In 2154, he was named as a Starfleet Command officer on the dedication plaque of the Columbia NX-02. (ENT: "Affliction", dedication plaque)
In January of 2155, he was named as a Flight Dynamics officer on directory placards at the Fleet Operations Center, Sol Sector. His office was located in room #1106. (ENT: "Demons" set artwork)
D. Mirabello was named after
Enterprise production associate Doug Mirabello.