J. Peyser was a Human Starfleet officer in the 22nd century.
In 2154, he was listed as a Deep Space Operations officer on the dedication plaque of the Columbia NX-02. (ENT: "Affliction", dedication plaque)
In January of 2155, he was listed as an EECOM officer at Starfleet Command's Fleet Operations Center, Sol Sector. His office was located in room #3465. (ENT: "Demons", directories)
This character was only mentioned in writing.
He was named for Enterprise special effects artist John Peyser.