Кёльнер Хайе
In the 2018–19 season, he guided Augsburg to a playoff-semifinal appearance, before signing with fellow DEL team Kölner Haie in April 2019. Stewart tenure was brief with Kölner Haie unable to see out the 2019–20 season, as he was replaced by Uwe Krupp on February 24, 2020.