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Summary: Join a team of experts to design, implement, and operate a next-generation secure infrastructure as part of a strategic digital transformation. Highlights: 1. High-visibility strategic program 2. Demanding and highly technological technical environment 3. Collaboration with recognized experts ### **Job Description and Responsibilities** As part of a **strategic digital transformation program**, a major public-sector organization is seeking a **Linux & Network Infrastructure Administrator** to strengthen its technical expertise team. The project focuses on deploying and evolving a **critical digital trust infrastructure**, supporting services with stringent security and availability requirements. The role is embedded within a team of experts responsible for the **design, implementation, and operation of a next-generation secure infrastructure**. This foundational program follows a multi-year trajectory involving technical architecture modernization, maintenance of a high security posture, and deployment of new digital services. **Your Responsibilities** Within an infrastructure and security expertise team, you will be involved across the entire platform lifecycle: Design and Architecture Participation in defining the **technical architecture** and infrastructure foundation Authoring of **Technical Architecture Documents (TAD)** and operational documentation Contributing to **migration plans and cutover scenarios** Infrastructure Implementation Installation and configuration of infrastructure components Setting up **virtualized, network, storage, and backup environments** Deploying virtual machines and system components Operations and Security Administration of **Linux** environments Maintaining operational readiness (**MCO**) and security compliance (**MCS**) Monitoring and incident analysis Contributing to audit and compliance processes Evolution and Continuous Improvement Participating in the rollout of **new technical services** Infrastructure automation Optimizing existing architectures ### **Required Profile** You hold a higher education degree in computer science (Bachelor’s to Master’s level) and possess **significant experience administering Linux and network infrastructures**. Ideally, you have: Solid mastery of **system and network architectures** Experience in **virtualization, storage, and security** Good knowledge of **best practices in architecture and technical documentation** Ability to operate effectively in **mission-critical and highly secured environments** You are recognized for: your **rigor and sense of responsibility** your **analytical and anticipatory skills** your **autonomy and teamwork spirit** your ease in demanding technical environments Proficiency in both **French and technical English** is required. Technical Environment **Operating Systems**: Linux (Ubuntu, Debian) **Virtualization**: Proxmox **Networking**: Cisco, advanced networking equipment **Security**: Stormshield, Palo Alto, Fortinet **Storage**: ZFS, NFS, CIFS, RAID, LVM **Backup**: Proxmox Backup Server **Monitoring**: Zabbix **SIEM**: ELK **Proxy / Reverse Proxy**: Squid, HAProxy **Databases**: PostgreSQL **Automation**: Ansible, Terraform **Advanced Security**: EDR, bastion, WAF ### **Useful Information** Participation in a **high-visibility strategic program** A **demanding and highly technological technical environment** Infrastructure projects with **significant impact on digital services** Collaboration with **recognized experts in security and architecture** Long-term assignment offering **stability and professional growth**
