Principal Design Engineer(Hybrid - 3 days onsite)£65,000 - £85,000 + Benefits + Relocation + Visa Sponsorship (if required)Work on real climate-impact engineering. Not theory.We''re hiring a Principal Design Engineer to join a fast-growing maritime technology company developing wind-assisted propulsion systems that reduce fuel consumption and emissions across global shipping.This is a hands-on leadership role where you''ll own key subsystems from concept through to production.What you''ll be doingLead mechanical and structural design of critical subsystemsOwn wing geometry development - balancing performance + manufacturabilityDevelop and manage load cases (real-world + classification)Translate requirements into robust, production-ready designsPerform and oversee FEA + structural analysisAct as technical lead with classification societies (DNV, LR etc.)Be the go-to expert for stress and fatigue analysisSupport and mentor junior engineersWhat you''ll needDegree in Naval / Mechanical / Structural / Marine Engineering5-10 years designing marine structures (classification-approved)Strong 3D CAD (NX, Inventor or similar)Solid FEA + hand calculations experienceExperience with DNV, LR, NK or similarStrong understanding of DFMA and structural integrityBonus points if you haveFatigue, buckling, or large welded structures experienceExposure to aero-structures or performance-led designStructural testing and validation experienceWhy this role stands outWork on real clean-tech hardwareJoi