ABGi is recruiting on behalf of its client, a large industrial group in the energy sector, for its future Senior Infrastructure Architect, based in Lyon.

🔎 YOUR MISSIONS

As part of the modernisation and securing of its digital infrastructure, our client wishes to strengthen its teams with an experienced Senior Infrastructure Architect.

You will join the digital infrastructure department of a large industrial group, in charge of Cloud, Datacentre, Linux platform, virtualisation, containerisation and hosting service environments.

Your work will focus in particular on critical Linux platforms, requiring robust, secure, scalable architectures suited to the operational constraints of a demanding industrial environment.

You will play a central role in designing technical architectures, defining enterprise standards and supporting project, infrastructure, cybersecurity and operations teams.

The missions entrusted to you:

Technical infrastructure architecture:

• Design and document hardware and software technical architectures suited to the company's needs;

• Analyse existing infrastructure and identify areas for improvement and modernisation;

• Carry out technical and economic feasibility studies;

• Define architectures meeting the functional and non-functional requirements of projects;

• Guarantee the security, performance, availability, scalability and compliance of the proposed solutions;

• Design interoperable, reversible architectures that comply with enterprise standards;

• Integrate production, maintenance and operational constraints from the design phases onwards.

Cloud, virtualisation and containerisation architecture:

• Design and evolve the architectures of Cloud infrastructure and virtualised environments;

• Define orchestration and containerisation architectures;

• Take part in the design and evolution of Kubernetes and OpenShift platforms;

• Define standards for integration, deployment, monitoring and operation of containerised platforms;

• Ensure the security, resilience and compliance of Kubernetes environments;

• Support projects integrating new infrastructure solutions;

• Ensure technical consistency between Linux platforms, virtualised infrastructure and containerisation solutions.

Security architecture and Bastion:

• Design administration Bastion and privileged access management architectures suited to the company's infrastructure;

• Define the terms of integration with existing security components;

• Take part in securing access to critical infrastructure and platforms;

• Ensure compliance with cybersecurity requirements and internal frameworks;

• Support project teams in taking security requirements into account from the design of architectures.

Documentation and architecture deliverables:

• Write and maintain the DAT (Technical Architecture Files);

• Produce architecture diagrams and detailed technical specifications;

• Formalise technology choices and integration principles;

• Prepare qualification files and test specifications;

• Produce integration, administration and operations guides;

• Guarantee the quality, consistency and maintainability of technical documentation;

• Ensure traceability of architecture decisions and capitalise on best practice.

Support for projects and teams:

• Take part in technical workshops and architecture committees;

• Present and defend architecture choices to the various stakeholders;

• Work with infrastructure, network, cybersecurity, project and operations teams;

• Provide technical support to deployment and production teams;

• Identify technical risks and propose suitable solutions;

• Carry out knowledge transfer to internal teams;

• Contribute to the continuous improvement of architecture standards and practices.

🎯 OUR REQUIREMENTS

Required skills and experience:

• Significant experience as a Senior Infrastructure Architect, ideally gained in complex enterprise environments;

• Proven expertise in enterprise IT infrastructure architecture;

• In-depth knowledge of enterprise networks and their architectural principles;

• Excellent command of writing DAT (Technical Architecture Files);

• Solid skills in Cloud, Datacentre and virtualised environment infrastructure;

• Good command of the principles of containerisation and orchestration;

• In-depth knowledge of Kubernetes architectures and enterprise Kubernetes platforms;

• Command of infrastructure security issues, in particular Bastion architectures and privileged access management;

• Good understanding of operational constraints, availability and business continuity;

• Ability to design secure, scalable and operable infrastructure;

• Experience producing architecture documents, technical specifications and qualification files;

• Ability to provide technical support to project and operations teams;

• Excellent writing, analytical and technical formalisation skills.

Project technical environment:

• Operating systems: Red Hat Enterprise Linux (RHEL 8, 9 and 10), Windows Server 2019 / 2022 / 2025;

• Virtualisation and infrastructure: VMware ESX, Nutanix Prism;

• Containerisation and orchestration: Kubernetes, OpenShift, Podman, enterprise Kubernetes platforms;

• Automation: Ansible;

• Cybersecurity: Bastion solutions, privileged access security and security architectures;

• Collaboration and project management tools: Jira, Confluence, Microsoft Teams, Outlook.

Experience across several of these technologies, combined with a genuine ability to design and formalise technical architectures, will be particularly appreciated.

Experience in a demanding industrial environment is a real advantage, particularly in the energy, nuclear, critical infrastructure, transport or heavy industry sectors.

👤 PROFILE SOUGHT

Holding a Bac+5 (master's level) in computer science, systems, networks, infrastructure or an equivalent field, you have significant experience in designing and architecting complex IT infrastructure.

You have genuine expertise in Linux, Cloud, virtualisation, Kubernetes and infrastructure security environments, as well as an excellent understanding of enterprise networks.

You are able to take part in the whole architecture design cycle, from needs analysis and feasibility study through to producing technical deliverables and supporting deployment and operations teams.

Recognised for your methodological rigour, autonomy, analytical mind and ability to synthesise, you know how to step back from complex technical issues and propose relevant solutions.

You also have excellent interpersonal and writing skills. Your teaching ability and your capacity to present, explain and defend your technical choices enable you to bring the various stakeholders together around the proposed architectures.

Additional information:

• Location: Lyon (69)

• Remote working: 50 %

• Start date: 1 January 2027

• Expected duration: until 31 December 2027

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