Senior Linux Platform Engineer Rhel Expert H/F - ClubSec

Le besoinContexte de la missionSaint-Gobain Group CTO Federated IT Services (FITS) team is seeking a highly skilled and motivated Senior Linux Platform Engineer to lead Linux platform expertise and standards within its federated infrastructure model.It is a key role in defining, standardizing, and securing Linux-based infrastructure services across Saint-Gobain's global IT landscape, with a strong focus on Red Hat Enterprise Linux ecosystems and automation.He/she is responsible for defining, maintaining and evolving Linux platform standards, ensuring security compliance, automation at scale, and providing expert-level support during major incidents and vulnerabilities.The engineer will act as a technical authority for Linux technologies across global ITS teams and will contribute to building robust, automated, and secure infrastructure services. He/she will act as the knowledge expert on Linux technologies to assist and drive the strategic development and usage of the Linux ecosystem.This role will act in close collaboration with Saint-Gobain India IT team (Indec) on a daily basis. It is strategically positioned in France (Tour Saint-Gobain) to ensure strong alignment with Group CTO governance and other GDI teams, to effectively support the transformation toward a Federated Target Operating Model (FTOM).Objectifs et livrablesKey ResponsibilitiesPlatform Expertise & Standards- Act as the subject matter expert for Red Hat Enterprise Linux (RHEL) and associated ecosystem.- Define, document, and enforce standards, hardening guidelines, and installation baselines for Linux systems.- Maintain platform consistency and compliance across global environments.- Provide guidance to regional teams on best practices and architecture decisions.RHEL Ecosystem & Tooling- Design, operate and enhance Red Hat Satellite platform and associated components: katello, foreman, subscription-manager, hammer-cli, pulp- Ensure efficient lifecycle management : patching, provisioning, compliance, content managementPackage & Repository Management- Design and maintain RPM packaging processes: build, versioning, signing (GPG), distribution- Define and manage enterprise repositories strategy: mirroring, lifecycle environments, content views- Ensure secure and traceable software delivery pipelinesAutomation & Infrastructure as Code- Lead the adoption and implementation of Ansible and Red Hat Ansible Automation Platform (AAP)- Develop and maintain playbooks, roles, collections, automation workflows- Promote Infrastructure as Code (IaC) principles across ITS teams- Contribute to automation of system configuration, patching, provisioning, application deployment and configuration, remediation and complianceGeneric Linux Stack Expertise- Scripting skills related to host management: shell based, cron jobs, logrotate, etc.- Provide deep expertise on key Linux components:- Databases: MariaDB, PostgreSQL- Middleware and runtimes: Python, Ruby, Node.js, Perl- Application services: Apache (httpd), Nginx- Cross-Platform & Virtualization Knowledge- Containerization expertise on K3S, kubvirt, podman with the CI/CD tool chain knowledge.Support and advise on other Linux ecosystems:- Debian / Ubuntu distributions, and their associated management tooling similar to Satellite in their distribution landscape.- Work with virtualization platforms: VMware (primary), Proxmox and derivatives (Red Hat Edge Device and Openshift Virt)Identity, Security & Compliance- Contribute to design and integration of authentication and identity mechanisms: SSSD, Red Hat IDM, Active Directory, PAM, OAuth, SAML, etc.- Certificates management, including ACME-based certificate automation- Define and enforce security hardening policies- Support compliance requirements and auditsIncident & Vulnerability Management- Act as technical escalation point for critical incidents and major vulnerabilities- Analyze issues and define: remediation procedures, mitigation strategies- Validate applicability and scalability of fixes across environmentsCollaboration & Enablement- Work closely with: FITS teams, other GDI teams, Regional ITS teams & Security teams- Provide technical documentation, training, and knowledge sharing- Interaction with vendors and purchasing teams- Support global standard adoptionComplementary Responsibilities- Contribute to platform strategy evolution (cloud, hybrid, automation-first approach)- Participate in tool standardization initiatives across infrastructure domains- Support integration with monitoring, backup and orchestration platformsDeliverablesArchitecture & Standards- Linux platform standards and hardening guidelines- Kickstarts, cloud-init and associated system image definitions- RHEL ecosystem architecture documentation (Satellite, repositories, automation)- Security and compliance baseline definitionsAutomation & Tooling- Ansible playbooks, roles and collections- Automation frameworks for provisioning, patching, remediationOperations- Standard operating procedures (SOPs) for Linux platform management- Incident resolution and vulnerability remediation procedures- Validation frameworks for patches and fixes deploymentKnowledge & Enablement- Documentation and knowledge base- Training materials for ITS teams- Technical guidelines and best practices

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