Operational Cyber Security Lead

Amentum Services, Inc.; United Kingdom; On-site; GBP 70,000 - 90,000; Full time

Job summary

A global engineering firm in the United Kingdom is seeking an Operational Cyber Security Lead to implement and improve cybersecurity practices across its global operations. The ideal candidate will lead cybersecurity efforts, oversee security compliance, and collaborate effectively with international teams. Strong technical expertise and strategic thinking are essential for this role, which supports large-scale projects and cybersecurity transformation initiatives.

Benefits

Flexible work arrangements

Disability-confident hiring practices

Qualifications

• Hands-on experience in vulnerability management and patch governance.
• Ability to translate cybersecurity risks into actionable insights for stakeholders.
• Proven success in leading global delivery teams.

Responsibilities

• Lead day-to-day cybersecurity operations across multiple regions.
• Oversee the security posture of global delivery projects.
• Conduct regular audits and risk assessments.

Skills

Strategic thinking

Proactive governance mindset

Risk communication

Technical expertise

Analytical capability

Global leadership

Cross-functional collaboration

Continuous learning & innovation

Tools

EDR/XDR

Active Directory

Microsoft 365

Azure

Job description

Join to apply for the Operational Cyber Security Lead role at Amentum.

At Amentum, we engineer the future with an unyielding commitment to innovation, integrity and collaboration. We tackle the most significant challenges in science, security and sustainability, while constantly pushing boundaries and working together to deliver on our promises. Our focus on ethical excellence thrives in a community where everyone can evolve, grow and succeed.

About The Opportunity

The Operational Cyber Security Lead ensures the implementation, maintenance and continuous improvement of cybersecurity practices across global operations. The role provides operational leadership to safeguard systems, data and infrastructure that support large‑scale multi‑national projects. You will collaborate with cross‑functional global delivery teams to embed robust security controls and align with organisational risk management frameworks.

Responsibilities

• Lead day‑to‑day cybersecurity operations across multiple regions and time zones.
• Oversee the security posture of global delivery projects, ensuring compliance with corporate and regulatory requirements.
• Ensure alignment with ISO 27001, Cyber Essentials Plus, Aus Essential 8, GDPR and other relevant frameworks.
• Conduct regular audits, risk assessments and security reviews of delivery environments.
• Partner with compliance and legal teams to address security‑related contractual obligations.
• Serve as a trusted advisor for security across international teams, vendors and partners.
• Support the rollout of global cybersecurity transformation programs.
• Foster a culture of cyber awareness through training and engagement with technical and non‑technical staff.
• Oversee vulnerability assessments, threat intelligence integration and proactive risk mitigation strategies.

Required Skills and Experience

• Strategic thinking – translate and balance technical requirements into business outcomes, ensuring alignment with security initiatives for global programmes.
• Proactive governance mindset – experienced in managing frameworks (Cyber Essentials Plus, ISO 27001, etc.) and embedding controls into operations.
• Risk communication – translate complex cybersecurity risks into clear, actionable insights for non‑technical stakeholders, including executive leadership.
• Technical expertise – hands‑on experience in vulnerability management, patch governance, endpoint protection (EDR/XDR), identity and access management (Active Directory) and securing on‑premise and cloud environments (Microsoft 365, Azure). 
• Analytical capability – interpret security data such as vulnerability scans, posture metrics (e.g., Microsoft Secure Score) and incident trends to drive measurable improvements.
• Global leadership – proven success in leading and influencing stakeholders across global delivery teams, ensuring accountability for cybersecurity objectives in complex, multi‑region environments.
• Cross‑functional collaboration – partner with Service Delivery, Project, and Vendor teams to embed consistent, scalable security practices across operations.
• Continuous learning & innovation – stay ahead of emerging threats, frameworks and technologies, fostering a culture of continuous improvement and knowledge sharing.

Our Culture

Our values are based on safety, integrity, inclusion and diversity. We put people at the heart of our business and genuinely believe that we succeed by supporting one another with a culture of caring. We value positive mental health and belonging for all employees, and we actively embed inclusion in everything we do.

Amentum is an equal opportunity employer. We welcome applications from all backgrounds and offer reasonable adjustments to the recruitment process, including disability‑confident hiring practices and flexible work arrangements. For more information, please contact [e-mail].

Amentum is proud to be an Equal Opportunity Employer. Our hiring practices provide equal opportunity for employment without regard to race, sex, sexual orientation, pregnancy (including childcare, breastfeeding or related medical conditions), age, ancestry, military or veteran status, color, religion, creed, marital or domestic partner status, medical condition, genetic information, national origin, citizenship status, low‑income status or mental or physical disability, as long as the essential functions of the job can be performed with or without reasonable accommodation. Learn more about your rights under Federal laws and supplemental language at Labor Laws Posters.