Star Trek Expanded Universe
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The USS Constant (NCC-19320) was an Excelsior-class Starfleet starship in service during the 24th century, under the command of Captain Elisa Mantada. (Star Trek: Pioneer)

From 2369 through 2378, Connor Burt served aboard the ship from rank of ensign to the rank of commander, eventually become the Chief of Engineering in 2374. ("In Custody")