Network and Security Service Delivery Engineer

National Energy System Operator

. Define and govern NESO’s network security architectural framework, including firewalls, Zscaler, and emerging technologies .

Posted 9/15/2026full-timeWokingham • United KingdomMid-LevelSenior💰 £60,000 - £70,000 per yearWebsite

Core Competencies

Role fit

Core Competencies

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Demonstrates extensive expertise in network security architecture, including the design and governance of secure network solutions across on-premises and cloud environments. Proficient in translating business strategies into technical solutions while leading teams in adopting automation and DevOps principles.

Highest-signal resume keywords

Network Security ArchitectureRouting and Switching (BGP, OSPF)Cloud Native Networking (AWS/Azure)Expert-Level Knowledge of Firewalls (Palo Alto, Fortinet, Zscaler)Automation Using Python or Ansible

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

Network SecurityTCP/IPDNSHTTP/2TLS 1.3IPsecSD-WANInfrastructure as Code (Terraform, CloudFormation)Security Metrics (KPIs, KRIs)Architectural Diagrams

Soft Skills

MentoringCollaborationTechnical DirectionAdvising StakeholdersKnowledge Sharing

Tools & Technologies

ZscalerPalo AltoFortinetSecurity Observability PlatformsITILAgile Methodologies

Certifications & Qualifications

CCNP SecurityCCIEPCNSENSE 7NSE 8CISSP-ISSAP

Industry Keywords

TOGAFSABSAISO 27001NISTSOC 2Zero Trust ModelsNetwork SegmentationSecurity StandardsRegulatory ComplianceCloud Security

Tech Stack

Tools & technologies

AnsibleAWSAzureCloudDNSFirewallsPythonSwitchingTCP/IPTerraform

About the role

Key responsibilities & impact

Define and govern NESO’s network security architectural framework, including firewalls, Zscaler, and emerging technologies
Translate business strategy into technical solutions, architectural standards, and roadmaps
Design scalable, secure network solutions for operational and strategic goals
Collaborate with cloud teams and partners across hybrid and cloud environments
Lead adoption of automation and DevOps principles in security operations
Mentor and guide engineering teams while providing technical direction
Advise internal and external stakeholders on network security architecture and best practices
Own end-to-end network security architecture across on-premises, cloud, and hybrid environments
Design, document, and govern network segmentation, Zero Trust models, next-generation firewall frameworks, and secure connectivity solutions
Develop and maintain a 12–24 month network security technology roadmap
Define, publish, and enforce enterprise-wide network security standards
Conduct architectural reviews for business, regulatory, and industry alignment
Act as the highest escalation point for complex network security incidents
Analyze packet captures and logs to address root causes and strengthen security posture
Research emerging threats, vulnerabilities, and industry trends
Design and review cloud security architectures
Provide technical mentorship and promote knowledge sharing and adherence to security standards

Requirements

What you’ll need

Extensive demonstrable experience in network security, with significant hands-on expertise in a dedicated Architecture or Lead role
Expert-level knowledge of routing and switching, including BGP and OSPF
Expert-level knowledge of TCP/IP, DNS, HTTP/2, TLS 1.3, IPsec, and SD-WAN
Advanced knowledge of on-premise and cloud-based firewalls, including Palo Alto, Fortinet, and Zscaler
Strong understanding of Cloud Native Networking in AWS/Azure, including VPCs, PrivateLink, Security Groups, and WAF
Network Principal-level knowledge of TOGAF, SABSA, or CISSP-ISSAP
Vendor professional/expert certification knowledge, including CCNP Security or CCIE, PCNSE, or NSE 7/8
Experience with infrastructure as code using Terraform or CloudFormation
Automation using Python, Ansible, or similar
Ability to create architectural diagrams, HLD documents, LLD documents, and executive presentations
Strong understanding of ITIL and Agile methodologies within a security context
Experience with ISO 27001, NIST, or SOC 2 governance frameworks
Expert understanding of security monitoring, operational reporting, alerting, and security observability platforms
Experience defining security metrics, KPIs, KRIs, and executive reporting
Ability to govern enterprise-wide reporting frameworks
Right to work in the UK by the start of employment
Usually resident in the UK for the last five years to apply for the required National Security Vetting clearance
Willingness or ability to participate in out-of-hours on-call

Benefits

Comp & perks

Bonus based on company performance
26 days annual leave as standard
Competitive contributory pension scheme with double matching up to a maximum company contribution of 12%
Annual enrollment to NESO Savings Plan with 50% matching contribution on savings of £20–£500 per month
Flexible Bank Holidays & Holiday Trading
Additional Birthday Day Off
Cycle to Work Scheme
Retail & Gym Discounts
Private Medical Insurance
Critical Illness Insurance
Personal Accident Insurance
Hybrid working from office and home
Flexible working arrangements