Duarte was an engineer who served aboard Deep Space 9 in the 2370s.

In early 2373, Duarte was as "sick as a vole" (in Whatley's words) and Rom was asked to take the engineer's place on the swing shift. Rom then questioned whether a particular seat was where Duarte usually sat. (DS9: "The Assignment")

This character was only mentioned in dialogue.
According to the script, Duarte's name was pronounced as "DWART-ay". [1]
Duarte's gender was unknown, as the individual was never referred to by a pronoun.