Senior OT Security Architect – Nuclear & Critical Infra

Amentum; Glasgow; Hybrid; GBP 70,000 - 90,000; Full time

Benefits offered by this job

Free medical cover

Digital GP service

Enhanced parental leave

Job summary

Amentum’s Nuclear-focused cyber security team is seeking proactive professionals to support a broad range of projects across OT and IT security. You will develop security requirements and risk-based controls, participate in accreditation activities, and help enable secure digital transformation in a safety‑critical environment.

The role offers hybrid working and opportunities to work across multiple market sectors, with strong emphasis on collaboration, development, and regulatory compliance.

Qualifications

• Experience in cyber security roles with a focus on OT environments.
• CISSP or CISM qualification; GICSP would be a plus.
• Willingness to travel to client sites (2–3 days/week).

Responsibilities

• Develop security requirements, architecture, and design for complex OT systems.
• Develop cyber security assessment approaches.
• Specify and implement a robust security risk management process.
• Support accreditation activities with the client and regulating authorities.
• Conduct security reviews and risk assessments in accordance with IEC 62443.
• Provide technical assistance to business development.
• Maintain familiarity with legislation and regulations of relevance.
• Build and maintain relationships with internal and external stakeholders.

Skills

OT security

Cybersecurity experience

Risk assessment

Networking knowledge

Security engineering

Education

CISSP

CISM

GICSP

Tools

MITRE ATT&CK

CISA ICS Training

Job description

Amentum’s Nuclear-focused cyber security team is seeking proactive professionals to support a broad range of projects across OT and IT security. You will develop security requirements and risk-based controls, participate in accreditation activities, and help enable secure digital transformation in a safety‑critical environment.

The role offers hybrid working and opportunities to work across multiple market sectors, with strong emphasis on collaboration, development, and regulatory compliance.