D. Rossi was a vehicle development officer who worked on the NX-01 Enterprise. (Star Trek: Enterprise set artwork)
In January of 2155, Rossi was working in Mission Operations at the Fleet Operations Center on Earth. Rossi's office was in room 1073. (ENT: "Demons" set artwork)
Rossi's name was listed on the dedication plaque of the NX-01 and on the directories seen in the background of the Fleet Ops Center set in "Demons". He was named for associate producer Dave Rossi.