L3 Application Support Engineer (COTS & Cloud Techno...

📍 Location: Braine-l’Alleud, Belgium (50% on-site at NCIA / 50% remote)

🔒 Security Clearance: NATO SECRET (mandatory)

📅 Contract duration: Starting 8 December 2025, until 31 December 2025, with extension possible until 31 December 2028

💼 Contract type: Long-term contract via our client, supporting NATO

About the Role

We’re looking for an experienced L3 Application Support Engineer to join a team delivering advanced technical support and modernization for NATO’s enterprise applications.

The position combines COTS application management, cloud infrastructure expertise, and Level 3 support responsibilities within a secure, mission-critical environment.

You’ll play a key role in maintaining and optimizing existing on-premise systems while supporting ongoing initiatives to migrate and modernize services in cloud and containerized environments.

Key Responsibilities

• Provide Level 3 support for enterprise COTS applications, ensuring service continuity and rapid issue resolution.
• Configure, automate, and maintain Atlassian products (primarily Jira Service Management and Jira Software) both on-premises and in Azure private cloud.
• Manage and monitor Kubernetes clusters and other containerized environments.
• Configure and administer Azure and AWS components, including CI/CD pipelines, EntraID groups, and cloud resource management.
• Handle incident management and troubleshooting, following ITIL principles and agreed SLAs.
• Collaborate with internal and external technical teams to escalate and resolve complex issues.
• Maintain and update documentation, knowledge base articles, and process guides for recurring tasks and best practices.
• Ensure compliance with NATO and NCIA security standards, maintaining access control and supporting system accreditation activities.
• Support users and stakeholders by providing clear communication, training, and continuous improvement input.

Required Skills and Experience

• Proven experience in application support or L3 support for complex, multi-tier enterprise environments.
• Strong understanding of COTS applications (commercial off-the-shelf software) lifecycle management.
• Hands-on experience with Atlassian Jira Service Management configuration, automation, and integration.
• Knowledge of cloud technologies (Microsoft Azure, AWS) including CI/CD and identity management (EntraID / Azure AD).
• Practical experience with containerization and Kubernetes in private or hybrid cloud setups.
• Familiarity with ITIL processes (Incident, Problem, and Change Management).
• Excellent analytical, documentation, and troubleshooting skills.
• Strong communication and organizational abilities.
• Must hold an active NATO SECRET Security Clearance — applications without valid clearance cannot be considered.

Nice to Have

• Previous experience in NATO, defense, or highly regulated environments.
• Background in cybersecurity or infrastructure monitoring.
• Knowledge of automation tools (Ansible, Jenkins, or similar).

Why This Role

This is an opportunity to work within an international team supporting critical defense systems, blending technical expertise with purpose-driven impact.

You’ll operate in a hybrid setup (partly remote, partly on-site at NCIA Braine-l’Alleud), contributing directly to NATO’s digital transformation initiatives.

📩 Interested and cleared candidates are invited to apply with an updated CV.

Only applicants holding a valid NATO SECRET clearance will be considered.