Certification Engineer

Groupe SII; Haarlem; On-site; EUR 60,000 - 84,000; Full time

Job summary

Groupe SII in the Netherlands is seeking a Certification Engineer to join the aircraft modification team, supporting design and certification activities throughout the lifecycle. You will ensure modifications comply with airworthiness regulations and contribute to innovative, efficient solutions.

The role requires an engineering degree in Aerospace or Mechanical (HBO level or higher), at least 2 years in aerospace, and strong communication and stakeholder management skills in an international

Qualifications

• Engineering degree in Aerospace or Mechanical (HBO level or higher).
• Minimum 2 years of experience in aerospace engineering.
• Experience in certification and/or aircraft modifications.
• Knowledge of cabin safety requirements is a plus.
• Strong communication and stakeholder management skills; English fluency.

Responsibilities

• Analyze and interpret customer requirements.
• Define and review aircraft modifications (structures, interiors, and electrical design).
• Conduct feasibility studies and optimize existing systems.
• Participate in design reviews and interface coordination.
• Prepare and review certification documentation (change classification, compliance demonstration, flammability).
• Support testing activities and evaluate results.
• Ensure compliance with EASA certification requirements.

Skills

Communication

Stakeholder mgmt

Teamwork

English fluency

Education

Aerospace/Mechanical Eng. degree (HBO)

Job description

Do you want to contribute to aircraft modifications and certification in a DOA environment?

Are you looking to work on high-impact aerospace projects in an international context?

We are currently looking for a Certification Engineer to strengthen our aircraft modification projects team.

Your Role

As a Certification Engineer, you will be part of our aircraft modification team, supporting the full lifecycle of design and certification activities.

You will ensure that all modifications comply with airworthiness regulations, while contributing to innovative and efficient technical solutions.

What You’ll Do

• Analyze and interpret customer requirements
• Define and review aircraft modifications, including: Metal and composite structures, Cabin interiors and cabin safety aspects and Support to electrical design aspects
• Conduct feasibility studies and optimize existing systems
• Participate in design reviews and interface coordination
• Prepare and review technical and certification documentation, including Change classification, Compliance demonstration and Flammability assessment
• Support testing activities and evaluate results
• Ensure compliance with EASA certification requirements
• Engineering degree (Aerospace, Mechanical, or equivalent – HBO level or higher)
• Minimum 2 years of experience in aerospace engineering
• Experience in certification and/or aircraft modifications
• Knowledge of cabin safety requirements is a strong plus
• Good understanding of structures (metal/composite) and/or interiors / systems
• Strong communication and stakeholder management skills
• Comfortable working in an international environment
• Fluent in English (additional languages are a plus)
• Proactive, flexible, and solution-oriented
• A good sense of humor

About SII

SII is a European digital and engineering services company with 16,000 experts worldwide.

In the Netherlands, SII supports leading aerospace and industrial companies in engineering, certification, and innovation activities. We value empowerment and entrepreneurship, offering a stimulating work environment where our consultants can grow and make an impact.

SII Netherlands is part of an EASA Approved Design Organization (DOA), enabling us to approve both minor and major aircraft modifications. Our certification engineers form a highly skilled team making these projects possible.

What We Offer

• Work on aircraft modification and certification projects
• Exposure to design, stress, and certification disciplines
• A collaborative and friendly team environment
• Open and entrepreneurial culture