Senior OT Security Architect for Critical Infrastructure

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

Benefits offered by this job

Free medical cover

Enhanced parental leave

Employee assistance programs

Matched funding & volunteering

Job summary

Amentum is seeking proactive Cyber Security Professionals to join our Nuclear-focused team, delivering security solutions across OT/IT environments for diverse client projects. You will help develop security requirements, assess risks, and support accreditation with regulators while collaborating across disciplines.

This hybrid role offers training and development, travel to client sites, and a pathway to advance within a global defence and national security portfolio.

Qualifications

• Experience in cyber security roles with focus on OT/IT environments.
• CISSP or CISM qualification; SANS GICSP a plus.
• Willingness to travel to client sites 2–3 days per 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 regulators.
• Conduct security reviews and risk assessments per IEC 62443.
• Provide technical assistance to business development.
• Maintain familiarity with relevant legislation and regulations.
• Build and maintain relationships with stakeholders.

Skills

OT Security

Threat & Risk Assessment

Cybersecurity Frameworks

Networking Knowledge

Security Engineering

CISSP/CISM

Tools

Endpoint Protection

IDS/IPS

Firewalls

Job description

Amentum is seeking proactive Cyber Security Professionals to join our Nuclear-focused team, delivering security solutions across OT/IT environments for diverse client projects. You will help develop security requirements, assess risks, and support accreditation with regulators while collaborating across disciplines.

This hybrid role offers training and development, travel to client sites, and a pathway to advance within a global defence and national security portfolio.