F. Zimmerman was a mid-22nd century Starfleet engineer.
In 2151, Zimmerman was noted on the dedication plaque of the Enterprise NX-01 for his work on the ship's spaceframe engineering.
In January of 2155, Zimmerman worked in (or as) Guidance and Navigation at the Fleet Operations Center on Earth. Zimmerman's office was located in room 1222. (ENT: "Demons" set artwork)
Zimmerman's name was seen on directory listings seen on the set of "Demons" as well as on the dedication plaque, and is an homage to
Enterprise set designer Fritz Zimmerman.