Aerospace Design Engineer

About SII Netherlands

SII 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.

As 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.

• Develop high-quality 3D models and detailed engineering drawings using CATIA and/or Solid Works
• Design and detail aircraft interior components and structural assemblies (metallic and composite)
• Perform conceptual, preliminary, and detailed design activities in compliance with customer specifications
• Conduct feasibility studies
  , define design concepts, and optimize existing systems (cost, weight, manufacturability)
• Apply Design for Manufacturing & Assembly (DFM/DFA) principles to ensure efficient industrialization
• Participate in design reviews (PDR, CDR) and provide technical justifications
• Manage and coordinate interfaces between systems and stakeholders
  , ensuring integration consistency
• Prepare 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 improvements
• Perform tolerance analysis and stack-up calculations to ensure performance and reliability of assemblies

• Bachelor’s or Master’s degree in Mechanical or Aerospace Engineering
• 2 to 5 years of experience in mechanical design (aerospace or high-tech industry)
• Strong expertise in CATIA V5 and/or Solid Works
• Good knowledge of aircraft structures, interiors, or mechanical systems
• Understanding of manufacturing processes (machining, composites, assembly)
• Experience in GD&T, tolerance management, and design optimization
• Familiarity with aerospace standards and certification constraints is a strong plus
• Strong communication skills and ability to work in multidisciplinary teams
• Fluent in English, Dutch is a plus

• Opportunity to work on high-impact aerospace and defense projects
• Exposure to design, stress, and certification activities
• A dynamic and international engineering environment
• Strong autonomy and responsibility in your assignments
• Career development opportunities within the SII Group
• Competitive salary package (fixed + bonus + benefits)

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.