Principal Mechanical Design Engineer Derby, Derbyshire Up to £75,000 + Benefits (flexible) The position will suit an experienced mechanical design engineer looking for an opportunity to develop their career within a fast-paced organisation at the cutting edge of engine design and development. You will be responsible for the concept design, development and delivery of hydrogen and diesel engine / powertrain systems and components from concept to launch. You will also ensure robust system/component regulations, quality, cost and timing requirements are met. As a principal engineer you will lead a small team and be required to mentor and develop the engineers utilising your wealth of experience with engine / powertrain technologies. The Role: Principal Mechanical Design Engineer You will be responsible for: End-to-end mechanical design engineering activities (research, concept, 3D design, delivery and launch) relating to engine design, for example; Valvetrain design (DOHC / SOHC), Timing gear systems, Crankcase ventilation (CCV), Aftertreatment systems (e.g., DEF / SCR), Fuel systems, including hydrogen experience, Air handling systems (e.g., intake manifolds, throttle bodies) Supporting in-house quality, manufacturing and service teams in resolving complex technical issues that lead to engineering change Creating clean sheet concept designs from first principles. Plan and execute Proof-of-Concept assessment either through test campaign, and/or first principle analysis ..... full job details .....