Certification Engineer

Groupe SII; Haarlem; Hybrid; EUR 55,000 - 75,000; Full time

Job summary

SII Netherlands is seeking a Certification Engineer to strengthen 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 in an international environment. Fluent English is required, and the role offers collaboration with a global team.

Qualifications

• Engineering degree in aerospace or mechanical field (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.

Responsibilities

• Analyze and interpret customer requirements for aircraft modifications.
• Define and review modifications including structures, interiors, and systems.
• Conduct feasibility studies and optimize existing systems.
• Participate in design reviews and interface coordination.
• Prepare and review technical and certification documentation, including Compliance demonstration and Flammability assessment.
• Support testing activities and evaluate results.
• Ensure compliance with EASA certification requirements.

Skills

Communication skills

English language

Stakeholder management

Proactive mindset

Team collaboration

Education

Aerospace/Mechanical Engineering degree

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