H. Zimmerman was a Starfleet officer who served during the late 23rd century.

In 2293, Zimmerman was assigned to the Office of Science Ops, according to the dedication plaque of the USS Enterprise-B. (Star Trek Generations, dedication plaque)

This character was only mentioned in writing.
He was named after art director Herman Zimmerman.
According to the unseen fourth page of the Operation Retrieve chart, Zimmerman was the captain of the USS Republic (NCC-1371), which was at the time located in Sector 22956.
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