AUSTIN, Texas--(BUSINESS WIRE)--Hyliion Holdings Corp. Â (NYSE American: HYLN), a developer of sustainable electricity-producing technology, is excited to announce Darrell Preble has joined Hyliion as the Vice President of Operations. In this role, Preble will be responsible for scaling Hyliion's manufacturing infrastructure to bring the KARNOâ"¢ Power Modules to market in an efficient and cost-effective way. Preble brings extensive experience from the energy industry, with a track record of build. ...