During the 2015 and 2016 seasons, he served as Washington’s defensive coordinator. Barry’s defense was ranked 28th in yards allowed for both seasons while it was a slightly better 17th and 19th in points allowed respectively.
In Washington, Barry ran an odd front system with varied coverages. According to Pro Football Focus, he used Cover 3 just over 22 percent of the time, Cover 1 just under 20 percent of the time, Cover 2 under 10 percent of the time and Cover 4 under four percent of the time. Barry also ran a blitz rate of 28 percent which was 19th in the NFL at the time.