Senior Network Security Engineer — Zero-Trust & Cloud Proxy

Hamilton Barnes Associates Limited; United Kingdom; On-site; GBP 129,000 - 148,000; Full time

Job summary

Hamilton Barnes Associates Limited is seeking a Senior Network Security Engineer in the United Kingdom to design and manage enterprise web security, including Zscaler ZIA/ZPA and Blue Coat ProxySG. The role focuses on SSL inspection, zero-trust access, and in-browser Island security integration.

You will lead policy engineering, incident response, and platform migration from legacy proxies to cloud-delivered security solutions in a regulated financial services environment.

Qualifications

• Hands-on policy configuration for secure web gateway
• Experience designing enterprise web security
• Regulated financial services environment experience preferred

Responsibilities

• Design, implement, and maintain Zscaler ZIA/ZPA policies across enterprise traffic
• Build and tune access, DLP, SSL/TLS inspection, and URL filtering policies
• Architect ZTNA solutions replacing legacy VPN/proxy chains
• Investigate and respond to web-based threats using proxy telemetry
• Lead or support migration from legacy proxies to cloud-native security platforms

Skills

Zscaler policy config

ProxySG policy

SSL/TLS inspection

Zero-trust design

Incident response

Tools

Zscaler ZIA/ZPA

Blue Coat/ProxySG

Island enterprise browser

Job description

Hamilton Barnes Associates Limited is seeking a Senior Network Security Engineer in the United Kingdom to design and manage enterprise web security, including Zscaler ZIA/ZPA and Blue Coat ProxySG. The role focuses on SSL inspection, zero-trust access, and in-browser Island security integration.

You will lead policy engineering, incident response, and platform migration from legacy proxies to cloud-delivered security solutions in a regulated financial services environment.