At its Sheffield, MA facility, Covestro produces extruded polycarbonate sheets for use in a wide variety of applications, including signage, skylights, lighting, security glazing, recreation, mass transportation and heavy equipment. Now Hiring Engineers: Process Quality Reliability If you are curious, courageous, and colorful, we would love to welcome you to our team! Covestro provides employees with financial security enabling them to enjoy a healthy work-life balance. In addition, Covestro offers a wide range of employee benefits and a $3,500 sign-on bonus for these positions.