About SII NetherlandsSII Netherlands is a fast-growing engineering and consulting company based in Haarlem, specialized in mechanical design, stress analysis, and certification activities across aerospace and high-tech industries.We support leading clients on complex projects ranging from aircraft structures and interiors to space and defense systems, delivering full lifecycle engineering services—from concept to certification.Your RoleAs a Design Engineer, you will be involved in the full product development lifecycle, from early concept definition to detailed design and industrialization, in a demanding and highly regulated aerospace environment.You will work in close collaboration with multidisciplinary teams (stress, systems, certification, manufacturing) to deliver robust and optimized engineering solutions.Main ResponsibilitiesDevelop high-quality 3D models and detailed engineering drawings using CATIA and/or SolidWorksDesign and detail aircraft interior components and structural assemblies (metallic and composite)Perform conceptual, preliminary, and detailed design activities in compliance with customer specificationsConduct feasibility studies, define design concepts, and optimize existing systems (cost, weight, manufacturability)Apply Design for Manufacturing & Assembly (DFM/DFA) principles to ensure efficient industrializationParticipate in design reviews (PDR, CDR) and provide technical justificationsManage and coordinate interfaces between systems and stakeholders, ensuring integration consistencyPrepare and review technical and certification documentation in line with aerospace standards (EASA environment when applicable)Support prototype manufacturing, assembly, and testing phases, including troubleshooting and design improvementsPerform tolerance analysis and stack-up calculations to ensure performance and reliability of assembliesYour ProfileBachelor’s or Master’s degree in Mechanical or Aerospace Engineering2 to 5 years of experience in mechanical design (aerospace or high-tech industry)Strong expertise in CATIA V5 and/or SolidWorksGood knowledge of aircraft structures, interiors, or mechanical systemsUnderstanding of manufacturing processes (machining, composites, assembly)Experience in GD&T, tolerance management, and design optimizationFamiliarity with aerospace standards and certification constraints is a strong plusStrong communication skills and ability to work in multidisciplinary teamsFluent in English, Dutch is a plusWhat We OfferOpportunity to work on high-impact aerospace and defense projectsExposure to design, stress, and certification activitiesA dynamic and international engineering environmentStrong autonomy and responsibility in your assignmentsCareer development opportunities within the SII GroupCompetitive salary package (fixed + bonus + benefits)Why Join SII Netherlands?Joining SII Netherlands means becoming part of a flexible, expert-driven engineering organization with strong capabilities in aerospace and high-tech sectors.You will work on innovative projects, collaborate with highly skilled engineers, and contribute directly to the success of complex industrial programs

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Aerospace Design Engineer