The home side's rough start to the season continued, as an early goal stood up for the Black-and-Red.
The visitors had the lead six minutes into the game. Davy Arnaud found Cristian Fernandez on the left side of the box with a switch and the Spanish left back hit a deflected cross that found Chris Rolfe. Unmarked from 12 yards out, Rolfe chested down and finished low.
After a lackluster first half, the Union started the second period with more attacking intensity. They created one real moment of danger midway through the second period, but Bill Hamid made a tremendous double save to deny Andrew Wenger and then Conor Casey, keeping his team ahead.
Despite making three attacking substitutions in the second half, the Union were unable to trouble the DCU back line much, and the visitors held on for a fairly comfortable win.
With its fourth win of the season, United has surpassed its win total from all of last season. The Union, meanwhile, have just one win on the season and are in the midst of a franchise-worst nine-game winless streak.