"The task of leadership is not to put greatness into humanity, but to elicit it, for the greatness is already there." John Buchan


PSI's Leadership Team, both in the US and Belgium, consists of industry leaders from the polymer sciences, film manufacturing, packaging, packaging machinery, printing, and business finance sectors.
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Günther Winnerl
Chief Marketing Officer

Günther Winnerl is based in Germany managing the Strategic Global Business Development of key PSI accounts. He has a 15 year experience in Business Development and Commercial Operations in the plastic films industry and was most recently Head of Sales Specialty Films at Bayer MaterialScience and Covestro AG.  Guenther has an MBA of Science from Landshut University of Applied Sciences.

Christine Schaefer
Director of Marketing

Chris Schaefer is a tenured Marketing leader with a career built in the flexible packaging industry. Chris is the Director of Marketing for PSI’s thin gauge bio-based sealant films with global responsibility including Europe’s Sidaplax operation. Prior to joining PSI, Chris held senior market development positions covering N. America and Europe. As a descendant of Montana ranchers, Chris grew up composting for the family’s organic garden and is passionate in green pursuits. Elevating packaging to more sustainable and compostable options is a natural evolution.