GreenMantra Technologies, a clean technology company that upcycles and transforms recycled plastics into value added specialty polymers, appointed Donald Wiseman and Adam Shepherd to its board of directors.

Wiseman is president of Tundra Companies, a Minnesota-based producer of advanced polymers and composites. He was previously president at PolyOne Corporation, leading its Performance Products and Solutions business unit and serving as GM of the company’s Geon Performance Materials business. His career experience also includes business and operating leadership roles at Johns Manville, Cabot Microelectronics Corporation, Americhem, Michelman and Rohm & Haas.

Shepherd serves as president of Celina Capital Corporation, a Toronto-based family office that specializes in investment in private operating companies. Prior to joining Celina, he spent a large portion of his career at Citibank Canada as a derivatives specialist, corporate banker and leader of Citibank’s private bank.