J. Reeves-Stevens was a Human Starfleet officer in the 22nd century.

In 2154, she was listed as a Missions Operations officer on the dedication plaque of the Columbia NX-02. (ENT: "Affliction", dedication plaque)

In January of 2155, she was listed as a Missions Operation officer on directory placards at Starfleet Command's Fleet Operations Center, Sol Sector. Her office was located in room #1186. (ENT: "Demons", directories)

This character was only mentioned in writing.
It was possible that J. Reeves-Stevens and G. Reeves-Stevens were related. J. Reeves-Stevens was named after "Demons" co-writer Judith Reeves-Stevens.