Jacob Smith was a Starfleet security officer who served on Deep Space 9.
In 2383, Jefferson Blackmer asked Smith if he could corroborate Sarina Douglas' accusation that Rahendervakell th'Shant and zh'Vesk had threatened revenge on the Federation for suppressing the Shedai genome database. Smith could not. (ST - Typhon Pact novel: Plagues of Night)