M. Rush was the name of several Human Starfleet officers in the 22nd century. In 2151, he was listed as an Imaging and Sensor Technologies officer on the dedication plaque aboard Enterprise NX-01. (ENT: "Broken Bow", dedication plaque. In 2154, he was listed as a Propulsion Systems officer on the dedication plaque aboard Columbia NX-02. (ENT: "Affliction", dedication plaque) In January of 2155, he was listed as a Flight Director on a directory placard at Starfleet Command's Fleet Operations Center, Sol Sector. His office was in room #1039. (ENT: "Demons", Starfleet directory)