S. Rissmiller was a Human Starfleet officer in the 22nd century.

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

In January of 2155, she was listed as an APO officer on a directory placard at Starfleet Command's Fleet Operations Center, Sol Sector. Her office was located in room #1133. (ENT: "Demons", United Earth directory)

This character was only mentioned in writing.
She was named after assistant to producers Sarah Rissmiller.