Senior Security Architect – Defence & National Infrastructure

Amentum; Cardiff; On-site; GBP 85,000 - 120,000; Full time

Benefits offered by this job

Free medical cover

Digital GP services

Enhanced family-friendly policies

Employee assistance program

Matched funding

Volunteer days

Charitable contributions

Job summary

Amentum is seeking an experienced Security Architect to design and oversee robust security architectures for ICT capabilities across critical national infrastructure and defence programmes. You will translate business needs into security requirements, align architectures with strategic goals, and lead risk analyses and incident response planning.

With 5 years of UK Defence security experience, you will work with firewalls, IDS/IPS, SIEM and other security technologies, producing clear technical

Qualifications

• Degree qualified in Cyber Security, Computer Science, Engineering, or related discipline (or equivalent experience).
• Excellent communication and stakeholder engagement skills, with the ability to influence at senior levels.
• Strong analytical skills with the ability to break down complex security challenges.
• Ability to produce high-quality technical documentation for both technical and non-technical audiences.

Responsibilities

• Designing Security Architecture. This is the core responsibility, involving the creation and oversight of robust security architectures for the ICT capabilities we are designing for our client.
• Strategic Alignment. Ensuring that security architectures align with the client's overall business strategy and technology goals.
• Threat and Vulnerability Management. Identifying, assessing, and communicating current and emerging security threats and vulnerabilities.
• Security Solution Design and Evaluation. Researching, evaluating, and recommending security technologies, tools (e.g., firewalls, VPNs, IDS/IPS, EDR, SIEM, SOAR), and solutions to mitigate identified threats and address security needs.
• Policy and Procedure Development: Defining, implementing, and maintaining corporate security policies, standards, and procedures to ensure compliance with industry regulations, legal requirements (e.g., GDPR, HIPAA), and best practices.
• Incident Response and Management: Playing a key role in developing incident response plans and coordinating efforts to detect, analyse, and respond to security incidents and breaches.
• Stakeholder Communication and Collaboration: Effectively communicating complex security concepts, risks, and recommendations to diverse technical and non-technical stakeholders, including senior management.

Skills

Security Architecture

Stakeholder Engagement

Security Risk Analysis

Technical Documentation

Education

Degree in Cyber Security / CS / Engineering

Tools

Firewalls

VPNs

IDS/IPS

EDR

SIEM

SOAR

Job description

Amentum is seeking an experienced Security Architect to design and oversee robust security architectures for ICT capabilities across critical national infrastructure and defence programmes. You will translate business needs into security requirements, align architectures with strategic goals, and lead risk analyses and incident response planning.

With 5 years of UK Defence security experience, you will work with firewalls, IDS/IPS, SIEM and other security technologies, producing clear technical