Network Security Architect - Newbury

CBSbutler Holdings Limited trading as CBSbutler; Newbury; Hybrid; GBP 111,000 - 148,000; Part time

Job summary

CBSbutler Holdings Limited trading as CBSbutler is seeking a Senior Network Security Architect for a 6-month contract in Hampshire. The role focuses on hands-on lead design across routing, switching, and security for complex multi-vendor environments, delivering high-quality designs and runbooks.

You will work in a hybrid arrangement, delivering network and security solutions, collaborating with customers, architects, and vendors, and mentoring junior engineers.

Qualifications

• Strong experience with Cisco, Juniper and Fortinet technologies.
• Advanced knowledge of routing and switching, including BGP, OSPF, IS-IS, EIGRP, VLANs, STP, VPC/LACP and QoS.
• Experience with Cisco ACI, including spine/leaf, tenants, VRFs, BDs, EPGs and contracts.
• Experience in network security, including NGFWs, IPsec, SSL VPN and SD-WAN security.
• Experience with F5 BIG-IP, L4/L7 load balancing, SSL offloading and GSLB.
• Experience with data centre networking and high-availability architectures.
• Network automation experience using Python, Ansible or network APIs is desirable.
• SC cleared.

Responsibilities

• Take a technical lead role in the design, implementation and delivery of complex multi-vendor network and security solutions.
• Lead the design and implementation of complex network and security solutions.
• Produce HLDs, LLDs, implementation plans and operational runbooks.
• Configure and troubleshoot enterprise and service-provider network infrastructure.
• Provide technical leadership and act as a senior escalation point.
• Work with customers, architects, project teams and vendors to deliver solutions.
• Lead technical discussions and present solutions to technical and non-technical stakeholders.
• Mentor and support other engineers.
• Conduct design validation, testing and technical assessments.

Skills

Cisco

Routing & Switching

BGP

OSPF

IS-IS

EIGRP

VLANs

STP

QoS

NGFWs

SSL VPN

SD-WAN

F5 BIG-IP

L4/L7 Load Balancing

Python

Ansible

Cisco ACI

SC Cleared

Data Centre Networking

Tools

Cisco ACI

F5 BIG-IP

Ansible

Job description

Salary: £? - ? per year

Requirements

• Strong experience with Cisco, Juniper and Fortinet technologies.
• Advanced knowledge of routing and switching, including BGP, OSPF, IS-IS, EIGRP, VLANs, STP, VPC/LACP and QoS.
• Experience with Cisco ACI, including spine/leaf, tenants, VRFs, BDs, EPGs and contracts.
• Experience in network security, including NGFWs, IPsec, SSL VPN and SD-WAN security.
• Experience with F5 BIG-IP, L4/L7 load balancing, SSL offloading and GSLB.
• Experience with data centre networking and high-availability architectures.
• Network automation experience using Python, Ansible or network APIs is desirable.
• SC cleared.

Responsibilities

• Take a technical lead role in the design, implementation and delivery of complex multi-vendor network and security solutions.
• Lead the design and implementation of complex network and security solutions.
• Produce HLDs, LLDs, implementation plans and operational runbooks.
• Configure and troubleshoot enterprise and service-provider network infrastructure.
• Provide technical leadership and act as a senior escalation point.
• Work with customers, architects, project teams and vendors to deliver solutions.
• Lead technical discussions and present solutions to technical and non-technical stakeholders.
• Mentor and support other engineers.
• Conduct design validation, testing and technical assessments.

Technologies

• Ansible
• Architect
• Cisco
• Support
• Load Balancing
• Network
• Python
• Security
• VPN

More

We are offering a 6-month contract for a Network Security Architect role based in Hampshire with a hybrid working arrangement and a day rate of circa £600. We are looking for a senior networking and security specialist to take a hands-on technical lead role across routing and switching, network security, data centre networking and SD-WAN, while producing high-quality technical designs and leading delivery in a complex multi-vendor environment.

last updated 36 week of 2026