Kennesaw State (6-4) had Georgia Tech (4-4) down to its final out on three separate occasions, finally earning the game-clinching outs with a double play.
Freshman reliever Mason Ward earned his first collegiate win after going 1 1/3 innings, allowing no hits and striking out one while earning support from Simmons and Bo Way as the two each came up with three hits.
Kennesaw State earned the first two runs of the game, one in the first off of a Way double and the second in the fourth on a Brennan Morgan groundout.
Georgia Tech put up its first run in the bottom of the sixth and tied things up in the bottom of the ninth after battling down to it final out before coming up with the game-tying run on Kennan Innis’ bunt single.
With both teams going scoreless through the 10th, the Owls put across the go-ahead run in the 11th as a wild pitch, followed by a throwing error on Georgia Tech catcher Grant Wruble scored Simmons from second base after he had reached on a walk.
Again down to their final out, the Yellow Jackets brought home the tying run as Ryan Peurifoy doubled to right field to knot the game up at 3-all.
But Ivey came up as the hero in the 12th inning, bringing home Alex Liquori and pinch-runner Justin Motley — a junior college transfer who graduated from Hillgrove High School — as his hit to deep right-center field was dropped to give the Owls the 5-3 lead.
Ward walked the first runner he faced before working out of the jam with the clinching double play from his infield.
The Owls picked up 10 hits during the outing, six from Way and Simmons.
Starter Gabe Friese, a former Marietta High standout, got the no decision despite going five innings allowing just three hits and striking out one.