Network Architect

The Network Architect designs, implements and manages enterprise-scale secure network infrastructures for defence and aerospace clients. You will lead the development of network strategies, architect secure multi-site connectivity solutions, and ensure networks support both current operations and future modernisation programmes. This role demands deep technical expertise in network technologies, security architecture and MOD-compliant network design., Network Architecture & Design

• Design enterprise-scale secure network architectures supporting defence operations
• Architect multi-site connectivity solutions including WAN, MPLS, SD-WAN and hybrid cloud network designs
• Design segmented network architectures incorporating zero-trust security models
• Lead network technology selection and recommend solutions aligned with security and operational requirements
• Design network resilience, failover and disaster recovery capabilities

Security & Compliance Integration

• Architect network security controls including firewalls, intrusion detection/prevention and advanced threat protection
• Design network segmentation and access control frameworks aligned with MOD Classification Guides
• Ensure network designs comply with Defence Security Policy and ITAR regulations
• Lead network vulnerability assessment and remediation planning
• Collaborate with security architects on integrated defence-in-depth network strategies

Network Modernisation & Implementation

• Lead design and implementation of network modernisation programmes (legacy to SD-WAN, 4G/5G integration)
• Guide cloud-ready network architectures supporting hybrid and multi-cloud strategies
• Design software-defined networking (SDN) solutions and network function virtualisation (NFV) implementations
• Lead network infrastructure migrations and technology transitions

Technical Leadership & Governance

• Lead network technical teams and provide architectural mentoring
• Establish network design standards, architecture patterns and operational governance
• Drive technical decision-making through network design reviews
• Document network architecture decisions and design specifications

Performance, Optimisation & Operations

• Design QoS policies and traffic management strategies supporting mission-critical applications
• Optimise network performance, bandwidth utilisation and latency
• Support network capacity planning and scalability assessments
• Establish network monitoring, troubleshooting and operational support frameworks

Customer & Stakeholder Engagement

• Serve as primary technical authority for network architecture discussions with customer leadership
• Present network recommendations to senior stakeholders and defence programme teams
• Manage network architecture workshops and customer design validation activities

Security Clearance

• Must hold or be eligible to obtain DV clearance - Essential
• 10 years continuous UK residency required

Experience & Expertise

• Minimum 12 years' network engineering experience with 5+ years in architecture role
• Proven experience designing enterprise-scale secure network infrastructures
• Strong background in defence, aerospace or government network programmes
• Demonstrated expertise with WAN, MPLS, SD-WAN and cloud-ready network designs
• Track record of leading network modernisation and infrastructure transformation programmes

Technical Knowledge

• Deep expertise in network design methodologies and architecture frameworks
• Expert-level knowledge of network technologies including routing, switching, firewalls and VPN
• Strong understanding of SD-WAN, software-defined networking (SDN) and network virtualisation
• Proficiency in cloud networking (AWS, Azure, or equivalent) and hybrid connectivity models
• Advanced knowledge of network security architecture including zero-trust security models
• Understanding of 4G/5G network technologies and wireless integration
• Familiarity with MOD security requirements, Classification Guides and defence contractor compliance
• Knowledge of network monitoring, analytics and optimisation tools

Personal Attributes

• Exceptional strategic thinking with strong technical depth
• Outstanding communication and presentation capabilities
• Strong problem-solving and analytical skills
• Proven ability to lead technical teams and influence senior stakeholders
• Commitment to security excellence and operational resilience

Desirable Requirements

• Previous DV or SC clearance
• Experience with defence and aerospace network programmes
• CCNP, JNCIP or equivalent advanced network certification
• Experience with network security specialisations (CCNP Security, CISSP)
• AWS/Azure networking certifications
• Knowledge of ITAR compliance and export controls, Applicants should be aware that DV clearance is essential and the vetting process typically takes 6-9 months. Applicants must have 10 years continuous UK residency.

Pulled from the full job description

• Company pension
• Private medical insurance, * Highly competitive salary and comprehensive benefits
• Enhanced pension and private medical insurance
• Flexible working and professional development support
• Opportunity to architect critical networks for major defence organisations

DXC Technology is a Fortune 500 global technology services company with over 40 years' presence in the UK, recently establishing its Aerospace and Defence Hub in Farnborough. We deliver critical network solutions supporting defence and aerospace organisations operating in highly secure, mission-critical environments., DXC Technology is an equal opportunities employer committed to building diverse, inclusive teams. Document Version: 1.0 | Last Updated: July 2026 At DXC Technology, we believe strong connections and community are key to our success. Our work model prioritizes in-person collaboration while offering flexibility to support wellbeing, productivity, individual work styles, and life circumstances. We're committed to fostering an inclusive environment where everyone can thrive.