Secure Infrastructure Architect – Classified Systems

Leonardo Belgium is seeking a Secure Infrastructure Architect to help define and build the foundations of a highly secured, fully isolated research environment. This facility will serve as a trusted ground where security measures and system architectures can be tested and validated against next-generation cybersecurity threats.

In this role, you will design, implement, and operate an infrastructure where strict isolation, hardware-based security controls, controlled data flows, and rigorously governed procedures are essential. You will collaborate with internal and international technical teams to ensure the infrastructure meets the highest assurance standards for confidentiality, integrity, and system resilience.

Job Specifications

• Location: Brussels (main office)

• Work schedule: Flexible – remote work fully supported. The role allows working from home or from our Brussels office

• Contract type: Permanent position preferred; freelance possible as well

• Starting date: January 2026

• Security: Eligibility for Personal Security Clearance (PSC) required

As a Secure Infrastructure Architect, you will have the rare opportunity to contribute to a high-assurance security program and to architect a one-of-a-kind environment for the protection against next-generation threats. You’ll gain hands-on experience at the intersection of classical IT security, advanced hardware components, and defense-grade infrastructure.

Your responsibilities will include:

• Defining design constraints based on requirements, risk assessments, and system infrastructure

• Performing risk identification and impact assessments related to classified information management

• Reviewing and validating system architectures and cybersecurity requirements

• Supporting integration and hardening of trusted COTS/MOTS hardware and software components

• Assisting in project phases including documentation, SRR milestone support, and design updates

• Consolidating hardening guidelines and security best practices

• Providing general IT architecture support during bidding and ongoing project phases

• Mid-seniority level; autonomy and proactivity essential

• Hands-on experience in restricted or classified environments, or strong understanding of operational security requirements

• Expertise in hardware security, network isolation, and secure system deployment

• Ability to work across security, IT architecture, and operational domains, translating requirements into actionable designs

• Strong documentation, communication, and coordination skills in international, multidisciplinary teams.

• Eligible for EU-PSC (Personal Security Clearance)

What do we have to offer?

• A unique and highly visible project for a major European Institution

• A role within Leonardo, a global leader in aerospace, defence, and cybersecurity innovation

• A dynamic environment where learning and career growth are actively supported

• Flexible working arrangements, with a strong focus on remote work

• A supportive, inclusive culture where collaboration and innovation thrive

• A competitive salary based on experience, skills, and industry requirements