T. Siegel was a Human Starfleet officer in the 22nd century.
In 2154, this individual was listed as an Environmental Systems officer on the dedication plaque of the Columbia NX-02. (ENT: "Affliction", dedication plaque)
In January 2155, this individual was listed as an EVA officer on directory placards at Starfleet Command's Fleet Operations Center, Sol Sector. Their office was located in room #3529. (ENT: "Demons", directories)
This character was only mentioned in writing.