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Senior Operational Technology (OT) Security Consultant

United Kingdom, Manchester · Job Posted May 05, 2026
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Job Description

Amentum are offering an exciting opportunity to join our growing team of Cyber Security professionals to work on a range of projects for our diverse client portfolio that covers Critical National Infrastructure, National Security, Defence and Nuclear market sectors. Our team is growing and are we looking for proactive and collaborative Cyber Security Professionals to work within our Nuclear market, providing a range of security services. With our deep technical, commercial, and strategic nuclear expertise we develop solutions that address our client’s critical challenges supporting digitalisation and security. As part of our team, you will support across the full spectrum of security engineering activities in support of the design, development, integration, delivery, and in-service support of complex technical projects. You will collaborate with the team to deliver cyber security solutions, address risks, and support secure and resilient digital transformation across the information and operational technology environments. Amentum is a "relationship" focused company and the building and developing of these relationships with our clients is a significant and important part of this role. Although this role is initially Nuclear focused, you will have the opportunity to work across multiple market sectors to suit your interests and career aspirations under a hybrid working arrangement that best suit each client's needs. Training and development opportunities specific to the project needs and those of your own career plan will be available and supported.

Job Responsibility

  • 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

Requirements

  • Experience in similar roles or transferable skills within a similar role
  • Certified Information Systems Security Professional (CISSP) or Certified Information Security Management (CISM) qualification
  • Able to travel to the client site on a semi-regular basis, averaging two to three days per week
  • Cyber Security work experience (with a significant focus on Operational Technology during that time)
  • Practical experience of IT and OT cyber security risk/threat assessment approaches
  • Understanding of design considerations with emphasis on operational safety and the availability/security of operating environments
  • Working knowledge and hands-on experience in a variety of operating systems and Operational Technology environments
  • Experience of security engineering and associated solutions (Endpoint Protection, IDS/IPS, Firewalls, etc.) for IT and OT environments
  • Working knowledge and understanding of networking technologies including architectures, key components, and common IT/OT protocols
  • IT and OT cyber security risk/threat assessment approaches

Nice to have

  • SANS Global Industrial Cyber Security Professional (GICSP)
  • Cybersecurity & Infrastructure Security Agency (CISA) Industrial Control Systems (ICS) Training
  • AttackIQ – MITRE ATT&CK
  • SANS Global Industrial Cyber Security Professional (GICSP)
  • Certified Information Systems Security Professional (CISSP)

What we offer

  • Free single medical cover and digital GP service
  • Enhanced parental leave pay
  • Free membership of employee assistance and parental programmes
  • Reimbursement towards relevant professional development and memberships
  • Matched-funding
  • Paid volunteering time
  • Charitable donations

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