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We are seeking an experienced Network Security Architect to strengthen the network security advisory and assurance capability of a critical national infrastructure organisation. These roles sit at the intersection of engineering, architecture and risk, providing practical security guidance to delivery teams as they design and implement new solutions. You will be embedded into live delivery workstreams, reviewing designs, performing threat modelling, assessing risk, and helping teams make secure, pragmatic decisions at pace.
Job Responsibility:
Act as a security advisor to engineering and architecture teams across live initiatives
Review solution designs and architectures from a security perspective
Perform threat modelling, risk assessments and security design reviews
Provide pragmatic guidance that balances security, delivery velocity and business outcomes
Identify and articulate security risks in a clear, proportionate way
Support teams in remediating security gaps and weaknesses
Contribute to the development of lightweight security patterns, standards and documentation
Operate as part of an assurance function rather than owning end-to-end solution design
Requirements:
Proven background as a Security Architect in complex environments
Strong understanding of modern application, infrastructure and cloud architectures
Experience conducting design reviews, threat modelling and security assessments
Ability to engage constructively with architects, engineers and product teams
Comfortable working in evolving, imperfect environments
Pragmatic mindset
Strong communication skills - able to explain risk and trade-offs clearly
Nice to have:
Experience in cloud security (AWS preferred)
Exposure to regulated or large-scale enterprise environments
Familiarity with Zero Trust, IAM, network segmentation, and modern security patterns