Location Pittsburgh, Pennsylvania, United States Regions Great Lakes, Northeastern US Gender Female
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Marilyn Horner is Executive Vice President and Executive Advisor for Trinseo after previously serving as Senior Vice President of Human Resources. She reports to Christopher D. Pappas, President and CEO, and is a member of the Executive Leadership Team.
Horner joined Trinseo (formerly known as Styron) in January 2011. She was previously Senior
Vice President and Chief Human Resources Officer of NOVA Chemicals Corporation. She held various leadership positions within NOVA Corporation and NOVA Chemicals, including Vice President & Controller for Olefins/Polyolefins, and Vice President and Executive Assistant to the CEO before assuming the role of Vice President, Human Resources and Corporate Effectiveness in 2006. She was appointed to her most recent role in NOVA in 2008. Marilyn joined Polysar Limited, a predecessor company of NOVA Chemicals Corporation, in 1985.
Horner holds a bachelor’s degree in Commerce/Finance from University of Windsor, and an MBA from the University of Windsor, Canada.
