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Expleo

End-to-end engineering, tech consulting, quality services

OT Cybersecurity Architect

Security Engineering & ArchitectureUpdated on Nov 5
Full-timeMontigny-le-Bretonneux, France€50k /yr

About the Job

Requirements

  • A degree from an engineering school or equivalent in computer science, industrial systems, or cybersecurity.
  • At least five years of cybersecurity experience, including significant experience in security architecture and industrial OT/ICS environments.
  • Expertise in IEC 62443, which is required, and ISO/IEC 27001 and ISO/IEC 27005.
  • Good knowledge of NIS 2, the Cyber Resilience Act, and machinery regulations.
  • Strong understanding of industrial network architectures, including SCADA, DCS, PLCs, and industrial protocols such as Modbus and OPC.
  • Knowledge of security technologies including network segmentation, industrial firewalls, bastion hosts, SIEM, OT IDS, and identity and access management, including IAM/PAM.
  • Ability to connect industrial business constraints with cybersecurity requirements.

Responsibilities

  • Define and validate secure OT cybersecurity architectures, including zones and conduits, industrial network segmentation, and defense in depth, in accordance with IEC 62443.
  • Conduct security architecture reviews for industrial systems, including SCADA, DCS, ICS, and IIoT, and support projects in implementing security requirements.
  • Design technical solutions for OT environments, including segmentation, bastion hosts, security monitoring, access management, and securing IT/OT flows.
  • Integrate cybersecurity-by-design requirements into industrial projects, both greenfield and brownfield.
  • Collaborate with IT, OT, engineering, and production teams to ensure security principles are applied in overall architectures.
  • Contribute to technology choices, proofs of concept, and technical scoping, and define OT cybersecurity standards and best practices.

Desired Qualifications

  • Certifications in IEC 62443, CISSP, CISM, or ISO 27001, or vendor certifications from Fortinet, Palo Alto, Cisco, or similar providers.

About the Company

Expleo

End-to-end engineering, tech consulting, quality services

Expleo provides end-to-end engineering, technology consulting, and quality services to help businesses with digital transformation. It combines software quality assurance and testing with engineering and R&D capabilities to design, build, test, deploy, and maintain software-enabled and engineered systems. It stands out by integrating software quality expertise with broader engineering and digital-transformation offerings under one umbrella for industries like banking and telecommunications. Its goal is to help organizations navigate digital transformation by delivering reliable, efficient, and scalable software and systems.

Company size
10,001+
Company stage
Not listed
Total funding
Not listed
Headquarters
Montigny-le-Bretonneux, France
Founded
1966

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