System Engineer - aerospace & defence

About the Position

System Engineer - aerospace & defence

Publié le 14/10/2026

CDI

SII Belgium

We are looking for a System Engineer to join a dynamic engineering team. In this role, you will contribute to the design, development, and integration of advanced systems used in both civilian and military environments. You’ll work closely with clients and stakeholders to define solutions and see them through to successful implementation.

SII is a European digital and engineering services company of 16,000 experts. SII in Belgium support large businesses in adopting new technologies and innovation management. We value empowerment and entrepreneurship, providing a fulfilling work environment for employees. Our mission is to contribute to the design and development of future products and services for customers. SII is committed to a sustainable digital world and is recognized as a Great Place To Work.

This position is ideal for someone with a passion for technology and a strong background in electronics, IT, or telecommunications, eager to take on new challenges in cutting-edge environments.

Responsibilities

• Understand and analyze client needs to propose tailored technical solutions;
• Contribute to the system architecture definition and ensure it meets customer requirements;
• Lead the system specification process and support technical discussions with clients;
• Draft technical specifications and provide input for selecting subcontractors for subsystem components;
• Manage the creation of key technical documentation, including design and configuration documents, user manuals, and test plans;
• Collaborate with internal teams and stakeholders to define key milestones in the integration, verification, validation, and qualification (IVVQ) process;
• Configure and prepare equipment for Proof of Concept (PoC) demonstrations;
• Offer expert guidance in your domain and assist clients in resolving complex technical challenges;
• Ensure consistency and alignment of system components (hardware and software) with design specifications and requirements;
• Assemble system components to evaluate overall performance, interactions, and functionality.

Requirements

• Master’s degree in Engineering (Electronics, Computer Science, Telecommunications, or related field);
• At least 3/5 years of professional experience;
• Experience with full development lifecycle processes, including requirements gathering, design, development, and integration;
• Strong expertise in end-to-end system design, third-party integration, and prototyping of electronic/IT systems;
• Knowledge of cloud technologies (Containers, Orchestrators, and Hypervisors...);
• Experience with tools like DOORS, Polarion, Capella, Enterprise Architect...;
• Familiarity with CI/CD processes is a plus;
• Familiarity with UX/UI design tools is a plus;
• Strong problem-solving skills and a passion for staying updated on new technologies;
• Ability to work independently and proactively while being an effective team player;
• Excellent communication skills, with fluency in English (B2 or higher); knowledge of French is a plus;
• EU member citizenship is required, and security clearance will be requested after hiring.

Company Culture

SII Belgium offers a warm, open, and empowering company culture, supported by an international group. We value self-motivation, experience, and a passion for technology. Our team is dedicated to maintaining and modernizing platforms and applications to ensure the best performance of digital tools used by customer advisors. We are invested in our consultant career and will support you through formation and career advancement. With our human-size in Belgium, we promote proximity and transparency with our teams.

This role offers a chance to work on innovative projects in a highly technical and collaborative environment. If you are passionate about technology and eager to develop systems that make an impact, we encourage you to apply! Let's Tech Together!

We Offer

• Competitive salary
• Opportunity to work on cutting-edge projects
• Professional development opportunities
• Collaborative and innovative work environment
• Career advancement support

About the Company

SII Belgium is part of a larger European digital and engineering services company with 16,000 experts. We support large businesses in adopting new technologies and innovation management. Our mission is to contribute to the design and development of future products and services for customers. Recognized as a Great Place To Work, we are committed to a sustainable digital world.