The Mountaineers finished the regular season 9-5-2 (4-2-1 MAC) and have won seven of their last 11 games.
Northern Illinois comes in to the match with a 6-9-3 record and is the No. 2 seed. The winner of this game will face either top-seed Akron or Bowling Green in Sunday's championship game.
WVC SOCCER: The University of Charleston and Davis & Elkins will take part in the NCAA Division II men's soccer tournament this weekend.
The Golden Eagles (13-1-4) host No. 3 Mercyhurst (14-5-1) at 7 p.m. on Saturday at Schoenbaum Stadium, while D&E (14-3-2) travels to face top-seed Gannon (12-5) on Sunday.
MU SOCCER: Marshall's Zach Hunter has been named to the Conference USA All-Academic team, making him the fifth Thundering Herd player to receive a conference honor in the last week.
Hunter, a redshirt junior from Mariette, Ga., started 13 games and recorded a team-best 3.74 grade-point average as a double-major in chemistry and math.