Dortmund are the league champs in the The Sioux Lookout and Dryden Men’s Senior Soccer league.
Dortmund beat United on Sunday in the league final on penalty kicks.
The game was tied 1-1 after regulation time.
Adam Moir scored in regulation time for Dortmund, while Evan Armit opened the scoring for United.
Dortmund advanced to the final by beating the Sioux Lookout Old Boys 5-4 in the semi-finals, while United doubled up the Sioux Lookout Pelicans 4-2 in the other semi.