Nagata was a Starfleet engineer who served in Montgomery Scott's team aboard the USS Enterprise.

In 2268, Lieutenant Nagata came across Miles O'Brien and Julian Bashir; Bashir was surreptitiously scanning for Arne Darvin using a medical tricorder, while O'Brien was pretending to make repairs. Nagata thought O'Brien and Bashir were doing the repair work that Scotty had assigned him and questioned why Bashir was using a medical tricorder. Bashir covered, by saying that he was studying work-related stress, which came in handy when O'Brien accidentally disabled the lights. Bashir said O'Brien was stressed and they withdrew, saying they were going to sickbay. (DS9 episode & novelization: Trials and Tribble-ations)

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