 AUSTIN, Texas--BUSINESS WIRE--Hyliion Holdings Corp. NYSE: HYLN Hyliion, a leader in electrified powertrain solutions for Class 8 semi-trucks, today announced that Mary Gustanski will join its board of directors. Gustanski has spent her nearly 40-year career bringing new technology to market in the ever-evolving automotive industry, with an emphasis on the development and commercialization of innovative solutions. As Senior Vice President and Chief Technology Officer of Delphi Technolog 