The R&D Product Development Engineer Co-Op joins GAF’s Residential R&D New Product Development team, working with Residential R&D Asphalt and Glass Mat teams and Residential Product Management to design and develop new products. Co-op students contribute to high-profile projects as members of working teams and receive guidance from a mentor who helps them understand the company and their responsibilities. Work may include creating and testing laboratory proof-of-concepts; supporting trials through experimental planning, material testing, and data analysis; and using technical findings to build business cases for capital investment. The role is performed under the guidance of a New Product Development Scientist or Engineer, with tasks to be completed in a timely manner. Candidates must be available full-time for at least six months in either the January–June 2027 or June–December 2027 term.