Principal Network Security Consultant

La-Fosse-1; Greater London; On-site; GBP 111,000 - 120,000; Part time

Job summary

La-Fosse-1 is recruiting for a Contract Principal Network Security Consultant to lead the refresh of the network security architecture within a predominantly on-prem, highly regulated banking environment in Central London.

You will provide senior technical direction on WAF, segmentation, firewall design, and VPN connectivity, and drive the uplift of F5 technologies while aligning security controls with risk metrics.

Qualifications

• Extensive experience designing and leading network security architectures.
• Strong knowledge of WAF, VPNs, firewalls and segmentation.
• Experience with on-prem infrastructure in regulated financial services environments.

Responsibilities

• Lead the refresh of the organisation’s network security architecture and roadmap, providing senior technical direction across a complex, predominantly on-prem environment within a highly regulated banking/CNI setting.
• Provide deep network security expertise across WAF, network segmentation, firewall architecture and rule sets, VPN connectivity and legacy network infrastructure, acting as a senior consultant rather than a hands-on engineer.
• Drive the ongoing uplift of the F5 environment, with strong experience across F5 technologies essential; exposure to Palo Alto and Blue Coat is highly desirable.
• Own the refresh of network security controls, translating security architecture into practical improvements and driving measurable progress against security and risk metrics.

Skills

Network security architecture

WAF

Firewalls

VPNs

Network segmentation

Legacy on-prem infrastructure

Security controls

Technical leadership

Tools

F5

Palo Alto

Blue Coat

Job description

Principal Network Security Consultant

A Global Financial Services Organisation requires a ContractPrincipal Network Security Consultant with deep expertise across network security architecture, WAF, F5, firewalls, network segmentation, VPNs and legacy on-prem infrastructure.

• IR35 Status: Outside
• Day Rate: £600-£650pd
• Travel: 2 days a week in Central London Office
• Duration: Initial 6 months

Responsibilities:

• Lead the refresh of the organisation’s network security architecture and roadmap, providing senior technical direction across a complex, predominantly on-prem environment within a highly regulated banking/CNI setting.
• Provide deep network security expertise across WAF, network segmentation, firewall architecture and rule sets, VPN connectivity and legacy network infrastructure, acting as a senior consultant rather than a hands‑on engineer.
• Drive the ongoing uplift of the F5 environment, with strong experience across F5 technologies essential; exposure to Palo Alto and Blue Coat is highly desirable.
• Own the refresh of network security controls, translating security architecture into practical improvements and driving measurable progress against security and risk metrics.