D. Rossi was a Human Starfleet officer in the 22nd century.
In 2151, he was named as a Vehicle Development officer on the dedication plaque of the Enterprise NX-01. (ENT: "Broken Bow", dedication plaque.)
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 Mission Operations officer on directory placards at Fleet Operations Center, Sol Sector. His office was room #1073. (ENT: "Demons", directories)