Bayer announced that it will shutter its operations in Robinson, a site that employs about 600 and has served as the German drug giant's North American headquarters for more than 50 years. Bayer informed its employees at the Robinson campus, which occupies a prominent spot overlooking the Parkway West. They include 569 company employees and 96 contractors whose jobs include finance, accounting, legal and technology functions. While other executives moved to New Jersey and the Robinson site evolved into the North American base for Bayer MaterialScience, roughly 600 Bayer administrative jobs remained at the campus. The company also has about 1,300 employees in the region who work for its radiology operations that are part of Bayer Pharmaceuticals.