Johnstone has played field hockey since she was nine and a native of Delta, British Columbia, Johnstone advanced in their club system to playing on the Canadian national team where she played nine years and earned 35 caps. In 2005-06, Johnstone played professionally for Hamburg in the German Premier Division.
Ali returns to Ohio from Northwestern, where she served as associate head coach for the past four years.
“I am so grateful that I have had the opportunity to work with Ali,” Northwestern head coach Tracey Fuchs said.