Secure-by-Design OT Design Assurance Engineer

Vysiion Limited; Chippenham; On-site; GBP 65,000 - 90,000; Full time

Benefits offered by this job

Birthday leave

Charity leave

Vitality health cover

Holiday purchase scheme

Learning and development support

Job summary

Vysiion Limited, Chippenham, UK, seeks an experienced OT and cybersecurity specialist to support discovery workshops, contribute to secure-by-design OT solutions, and help craft technical proposals.

You will review HLDs/LLDs for OT/IT converged systems, ensuring alignment with IEC 62443, NIS, CAF and ISO 27001 standards while collaborating with engineering, cyber, service and customer teams to deliver robust, compliant designs.

Qualifications

• Strong understanding of OT systems, architectures, and cyber security principles within CNI/OES environments.
• Experience with OT/IT convergence, including secure and resilient design considerations.
• Working knowledge of industrial networking and protocols (segmentation, zoning, routing).
• Experience contributing to or reviewing HLDs and LLDs.
• Understanding of cyber security frameworks and standards including IEC 62443, NIS Regulations, CAF, and ISO 27001.
• Experience applying cyber security risk assessment techniques in technical environments.
• Strong technical documentation and structured reporting skills.

Responsibilities

• Support technical discovery workshops, customer engagement activities, and bid responses.
• Contribute to secure-by-design OT solution development and technical proposals.
• Contribute to and/or review High-Level Design (HLD) and Low-Level Design (LLD) documentation for OT and converged OT/IT solutions, ensuring alignment with security, operational, and regulatory requirements.
• Ensure designs are technically robust, implementable, and compliant with standards including IEC 62443, NIS Regulations, CAF, and ISO 27001.
• Support compliance with NIS Regulations, NCSC CAF, sector-specific requirements, and internal governance frameworks.
• Work collaboratively with engineering, cyber security, service, operational, and customer teams.

Skills

OT systems

Cyber security

CNI/OES

OT/IT convergence

Industrial networking

HLD/LLD reviews

Security standards

Job description

Vysiion Limited, Chippenham, UK, seeks an experienced OT and cybersecurity specialist to support discovery workshops, contribute to secure-by-design OT solutions, and help craft technical proposals.

You will review HLDs/LLDs for OT/IT converged systems, ensuring alignment with IEC 62443, NIS, CAF and ISO 27001 standards while collaborating with engineering, cyber, service and customer teams to deliver robust, compliant designs.