OT Cyber Security Architect – Nuclear & Industrial

Amentum; Reading; Hybrid; GBP 70,000 - 110,000; Full time

Job summary

Amentum seeks a Cyber Security Professional to develop security requirements and architectures for complex OT systems, with a focus on risk assessment and accreditation activities. You will implement robust risk management and support business development across Nuclear, Defence, and critical infrastructure markets, with a hybrid working arrangement and travel to client sites.

The role demands hands-on security engineering across IT/OT environments, knowledge of IEC 62443, and familiarity with

Qualifications

• Experience in cyber security for OT/IT environments.
• Knowledge of security reviews and risk assessments per IEC 62443.
• Travel to client sites on a semi-regular basis (2–3 days/week).
• Familiarity with legislation and regulatory frameworks.

Responsibilities

• Develop security requirements, architecture and design for OT systems.
• Develop cyber security assessment approaches.
• Specify and implement a robust security risk management process.
• Support accreditation activities with client and authorities.
• Conduct security reviews and risk assessments per IEC 62443.
• Provide technical assistance to business development.
• Maintain familiarity with relevant legislation and regulations.

Skills

Cyber security

OT security

Risk assessment

Networking

Security engineering

IEC 62443

CISSP

CISM

GICSP

ATT&CK

Tools

Endpoint Protection

IDS/IPS

Firewalls

Job description

Amentum seeks a Cyber Security Professional to develop security requirements and architectures for complex OT systems, with a focus on risk assessment and accreditation activities. You will implement robust risk management and support business development across Nuclear, Defence, and critical infrastructure markets, with a hybrid working arrangement and travel to client sites.

The role demands hands-on security engineering across IT/OT environments, knowledge of IEC 62443, and familiarity with