Network Security Architect

Salary: £? - ? per year

Requirements

• Proven experience operating as a Security Architect or Network Security Architect within secure government or defence environments.
• Strong understanding of secure architectural principles and secure-by-design methodologies.
• Demonstrable experience producing High-Level Designs (HLDs), security design documentation, architectural decision records, technical standards, and guidance.
• Hands-on experience conducting control mapping against recognised security frameworks.
• Ability to interpret security requirements and demonstrate how technical controls satisfy them.
• Experience supporting assurance, governance, and accreditation activities.
• Familiarity with NIST 800-53, NCSC guidance, MOD security policies, JSP 440 principles, and defence assurance processes.
• Strong knowledge of TCP/IP, routing and switching, VLANs and segmentation, firewalls and security zoning, IDS/IPS technologies, VPN technologies, load balancing concepts, proxy technologies, Network Access Control (NAC), secure remote access, DNS and DHCP services, and Zero Trust networking concepts.
• Active UK MOD DV clearance required.
• Full-time onsite presence in Basingstoke, Hampshire required.

Responsibilities

• Develop and own High-Level Security Designs (HLDs) for complex network and infrastructure solutions.
• Define end-to-end security architectures supporting programme objectives and operational requirements.
• Produce and maintain security design documentation, architectural artefacts, and technical decision records.
• Conduct security control mapping against applicable frameworks and standards.
• Translate business, operational, and security requirements into pragmatic technical solutions.
• Work closely with infrastructure, network, delivery, and security teams to ensure secure-by-design principles are embedded throughout delivery.
• Review existing environments and identify architectural improvements, risks, and remediation activities.
• Support design governance activities including technical reviews, risk assessments, and design authorities.
• Provide security guidance throughout the project lifecycle, from concept through to implementation.
• Liaise with stakeholders across engineering, programme management, and customer teams to ensure alignment of security objectives.
• Contribute to accreditation and assurance activities where required.

Technologies

• Architect
• Embedded
• Support
• JSP
• Load Balancing
• Network
• Security
• TCP/IP
• VPN

More

We are seeking an experienced MOD DV Cleared Network Security Architect to support a high-profile government programme delivering secure and resilient enterprise capabilities within a highly regulated environment. This is a 12-month rolling contract based full-time onsite in Basingstoke, Hampshire, with a day rate of £600-£700 outside IR35. The role offers the opportunity to work across network and infrastructure security domains, helping us translate security requirements into robust technical designs and align solutions with MOD and government security standards.

last updated 28 week of 2026