Koster American has expanded its polymer coatings R&D team and marketing department to support growth, according to the company.

Humayun “Harry” Khan has joined the company as senior chemist to lead its polymer coatings R&D efforts, and Amber Plotner joined the company as QC/R&D chemist

Additionally, Samantha Samples has joined the company's marketing department as marketing assistant.

For more information, visit kosterusa.com.