DeCurtis was a male Human Starfleet engineer in the 24th century United Federation of Planets. By 2370, he had the rank of ensign. In 2370, he served aboard Deep Space 9 under Chief Miles O'Brien. Around Stardate 47569, Ensign DeCurtis was put in charge, by Commander Sisko directly, of checking the security measures surrounding the Paradan peace talks, when it was suspected that O'Brien had been replaced with a replicant Miles O'Brien. He was ordered to work without informing the replicant O'Brien, which elicited a rebuke from him, since O'Brien had discussed the security measures with the Paradans. Later, he worked on the security of the quarters assigned to the Paradans when the replicant O'Brien went to check on him. DeCurtis lied about being able to show him the measures he took in ord