Senior Network Security Architect – Remote Lead Design

CBSbutler Ltd.; Newbury; On-site; GBP 104,000 - 136,000; Full time

Job summary

CBSbutler Ltd. is seeking an experienced Senior Network Security Architect to lead design and hands-on delivery of complex network and security solutions in a high-profile enterprise environment.

You will work across Cisco, Juniper, Fortinet and F5 technologies, delivering advanced routing, security architectures and PoCs while mentoring engineers. The role requires strong Cisco ACI, multi-vendor experience and exceptional technical documentation, with remote work and travel to Newbury as

Qualifications

• Strong Cisco ACI experience.
• Advanced routing & switching expertise.
• Multi-vendor network implementation experience.
• Proven HLD/LLD and technical documentation skills.
• Excellent stakeholder and client-facing communication.
• Desirable certifications such as CCIE/JNCIE/ACMP.

Responsibilities

• Lead design and hands-on implementation of complex network and security solutions.
• Create high-level and low-level designs, implementation plans and runbooks.
• Work across Cisco, Juniper, Fortinet and F5 technologies.
• Design and troubleshoot Cisco ACI environments (spine/leaf, multi-site).
• Engineer BGP, OSPF, IS-IS, EIGRP, VXLAN, VLAN, STP, VPC/LACP and QoS.
• 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 testing; mentor engineers.

Skills

Cisco ACI

Routing & Switching

Network security

Multi-vendor

Technical documentation

Stakeholder management

Certifications (CCIE/JNCIE/ACMP)

Tools

Cisco IOS

ACI

Fortinet FortiOS

F5 BIG-IP

JunOS

Job description

CBSbutler Ltd. is seeking an experienced Senior Network Security Architect to lead design and hands-on delivery of complex network and security solutions in a high-profile enterprise environment.

You will work across Cisco, Juniper, Fortinet and F5 technologies, delivering advanced routing, security architectures and PoCs while mentoring engineers. The role requires strong Cisco ACI, multi-vendor experience and exceptional technical documentation, with remote work and travel to Newbury as