The No. 4 Seahawks (18-2) faced a number of obstacles -- injuries, tough competition in Anne Arundel County and two second-half deficits in the postseason -- but they were able to successfully fend off each to claim county, Class 4A East regional and state titles.
South River's strong team play was on full display when the Seahawks came from behind to knock off four-time defending Class 4A state champion Bethesda-Chevy Chase in penalty kicks to claim the program's third title and first since 1997.
After an injury to a defender early in the season forced Sis to move one player out of position and rotate two others, the Seahawks recorded nine shutouts.
South River avenged a 1-0 double-overtime loss to Arundel with a 3-0 victory to win the Anne Arundel County championship, and then defeated the Wildcats again in the Class 4A East regional final, coming back from a 2-0 deficit for an overtime victory to advance into the state semifinals.
"I think the key to our success was playing as a team," said Sis, who is 86-17-13 in seven years at South River. "Our offense [led by All-Metro Player of the Year Kacie Longo] played with confidence knowing we had a great back line and holding midfielder [Kat Wray] to defend and our defense played with confidence knowing that if they did give up a goal our offense was there to get us back into the game."