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# Network Security Architect

- **Company:** CBS Butler Limited
- **Location:** Newbury, UK (Remote available)
- **Experience:** Expert
- **Contract:** Temporary contract
- **Skills:** Link Aggregation (Ethernet), Apple IOS, Border Gateway Protocol, Catalyst (Software), Complex Networks, Enhanced Interior Gateway Routing Protocol, Virtual Private Networks (VPN), Junos, Python (Programming Language), Network Security, Netconf, Cisco Nexus Switches, Open Shortest Path First (OSPF), Overlay Transport Virtualization, Ansible, Virtual Local Area Networks, Transport Layer Security, Identity Services Engine, Load Balancing, Amazon Virtual Private Cloud (VPC), Juniper, Fortinet, Routing & Switching, Firepower, Restful APIs, Big Ip, Cisco
- **Published:** August 22, 2026
- **Apply:** https://www.cv-library.co.uk/job/225524357/network-security-architect

## About the Role

You'll be an experienced Network/Security specialist with a proven track record delivering complex enterprise or service-provider environments. You should have:

 * Strong Cisco ACI experience
 * Advanced routing & switching expertise
 * Strong network security experience
 * Multi-vendor implementation experience
 * Proven HLD/LLD and technical documentation skills
 * Strong stakeholder and client-facing capability
 * Experience leading technical delivery and mentoring engineers

 * Professional certifications such as CCIE, JNCIE, ACMP or equivalent are highly desirable.

Technical toolkit:
Cisco: IOS/IOS-XE/IOS-XR/NX-OS, ACI, Firepower, ISE, Catalyst Center/DNAC
Juniper: JunOS, SRX
Fortinet: FortiOS, FortiGate, FortiManager, FortiAnalyzer
F5: BIG-IP LTM/GTM/ASM/APM, iRules

Experience with Python, Ansible, REST/NETCONF/RESTCONF or gRPC is highly desirable.

## Description

* Lead the design and hands-on implementation of complex network and security solutions
 * Create professional HLDs, LLDs, implementation plans and operational runbooks
 * Work across Cisco, Juniper, Fortinet and F5 technologies
 * Design and troubleshoot Cisco ACI environments, including spine/leaf, multi-site and multi-pod
 * Engineer advanced BGP, OSPF, IS-IS, EIGRP, VXLAN, VLAN, STP, VPC/LACP and QoS solutions
 * Design and implement NGFW, VPN, security policy and HA architectures
 * Deliver F5 L4/L7 load balancing, SSL offload and GSLB
 * Lead PoCs, design validation and pre/post implementation testing
 * Act as the technical lead and primary point of contact for key stakeholders
 * Mentor engineers and coordinate technical delivery
 * Troubleshoot complex network and security issues and engage vendors when required


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