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

🔎 YOUR MISSIONS

As part of the evolution and securing of its industrial digital infrastructure, our client wishes to strengthen its teams with an experienced Senior Telecoms, Networks & IS Architect.

You will work within a unit in charge of industrial network and telecommunications solutions and digital services, in a demanding technical environment where cybersecurity, infrastructure availability and mastery of IS architectures are major challenges.

Your scope will notably cover industrial networks, IoT platforms, industrial video, security systems, datacentres and private cloud infrastructures.

You will play a central role in designing and evolving technical architectures, in collaboration with business teams, network experts, cybersecurity teams, infrastructure managers, suppliers and governance bodies.

The missions entrusted to you:

• Design, define and evolve Telecoms, Networks and IS technical architectures in critical industrial environments;

• Carry out architecture studies, technical pre-studies and feasibility analyses;

• Define the target architectures of IoT, industrial video, security and infrastructure protection platforms;

• Design architectures covering network infrastructures, systems, datacentres and private cloud environments;

• Support business teams in analysing needs and scoping use cases;

• Take part in preparing implementation phases and defining technical prerequisites;

• Design and support demonstrators, Proof of Concept (POC) and technical experiments;

• Define the principles of network interconnection, routing, segmentation and isolation;

• Manage requests for flow opening, and develop and maintain network flow matrices;

• Design and evolve IP addressing plans;

• Integrate cybersecurity requirements into architectures: firewalls, DMZ, IPSec VPNs, segmentation and securing of communications;

• Take part in IS risk analyses, cybersecurity studies and vulnerability reviews;

• Contribute to audits and security reviews of outsourced systems and infrastructures;

• Ensure the proposed solutions comply with the company's architecture standards and security frameworks;

• Prepare and present technical files before architecture boards and validation committees;

• Lead technical workshops and coordinate exchanges between the various experts and stakeholders;

• Produce and maintain Technical Architecture Files (DAT), operating files (DEX), and technical installation (PTI) and operating (PTE) procedures;

• Write detailed technical specifications, architecture diagrams and design documents;

• Carry out comparative studies, technology benchmarks and solution analyses;

• Maintain technology watch on network infrastructures, IoT solutions, cybersecurity and IS architecture technologies;

• Track technological developments and the roadmaps of publishers and suppliers;

• Identify areas for improvement in existing architectures and propose solutions suited to industrial constraints;

• Contribute to the continuous improvement of architecture practices and frameworks in an Agile / Product Mode environment.

🎯 OUR REQUIREMENTS

Required skills and experience:

• Minimum 8 years of professional experience in Telecoms, Networks, Infrastructure or IS architecture, with proven expertise in designing complex architectures;

• Significant experience in critical or sensitive industrial environments;

• Excellent command of network and telecoms architectures, LAN infrastructure and switching;

• Solid knowledge of the OSI model, IP architectures, routing and network interconnection principles;

• Mastery of MPLS, MPLS L3VPN technologies and the OSPF, BGP and MP-BGP protocols;

• Experience in network flow management, segmentation, isolation and IP addressing plans;

• Expertise in designing secure network architectures: firewalls, DMZ, IPSec and segmentation;

• Good knowledge of cybersecurity standards, frameworks and requirements for infrastructures;

• Experience in designing or evolving industrial IoT architectures;

• Good understanding of system and infrastructure architectures: virtualisation, DNS, authentication and distributed infrastructures;

• Knowledge of On-Premise datacentre and private enterprise cloud environments;

• Good command of containerisation and orchestration principles;

• Experience in writing Technical Architecture Files (DAT), technical specifications and architecture diagrams;

• Experience in preparing, presenting and defending technical solutions before architecture and IS governance committees;

• Ability to conduct technical analyses, comparative studies and architecture recommendations.

The following skills are real assets:

• Architecture of industrial video, video surveillance and infrastructure security solutions;

• Knowledge of protocols, equipment and constraints specific to industrial networks and OT systems;

• Experience in securing communications between industrial environments and information systems;

• Knowledge of availability, resilience and business continuity issues for critical infrastructures;

• Experience in carrying out POCs, demonstrators and technology experiments;

• Knowledge of enterprise architecture approaches and IS governance principles;

• Experience in industrial infrastructure modernisation or transformation projects;

• Mastery of Agile and Product Mode methodologies;

• Experience in the energy, nuclear, telecommunications, transport or critical infrastructure sectors.

👤 PROFILE SOUGHT

With a Bac+5 degree in IT, networks, telecommunications, cybersecurity or information systems, or equivalent experience, you can demonstrate at least 8 years of relevant professional experience, ideally between 8 and 15 years or more.

You have genuine expertise in technical architecture, with the ability to step back from complex environments, design coherent and secure solutions, and defend them before technical and decision-making stakeholders.

You are recognised for your excellent writing skills, your analytical and synthesis skills, and your ability to formalise complex architectures in clear, structured and usable technical files.

Autonomous, rigorous, methodical and proactive, you know how to work in a multi-stakeholder environment and collaborate with network, infrastructure, cybersecurity, business and IS governance teams.

Your interpersonal skills and your ability to present and argue your technical choices before architecture boards will be essential to success in this assignment.

Specific mission constraints:

• Mandatory electrical authorisation, or recognised equivalence in accordance with client requirements;

• An administrative background check may be required to access certain sensitive sites;

• Compliance with enhanced confidentiality and security requirements linked to the industrial environment;

• Ability to work within a service framework with objectives, deliverables and performance indicators.

📍 ADDITIONAL INFORMATION

• Location: Lyon

• Desired start: 1 January 2027

• Expected duration: until 31 December 2028

• Remote working: 2 days per week

• Environment: large industrial group in the energy sector

• Methodology: Agile / Product Mode

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