Susan Sackett was a Starfleet officer in the 24th century.
As early as 2363, she was a flag officer with the rank of admiral. (TNG: "Silicon Avatar", dedication plaque)
In 2368, she was listed as a Starfleet Command officer on the second version of the dedication plaque of the USS Enterprise-D. (TNG: "Silicon Avatar", dedication plaque)
This character was only mentioned in writing.
She was named after production staff member Susan Sackett.