Senior Network Security Engineer - Zscaler at i-confidential, United Kingdom, £Contract Rate

Senior Network Security Engineer (Zscaler)

Overview

We’re looking for a hands-on Network Security Engineer with strong Zscaler (or equivalent SASE/SSE) experience to help bring structure and clarity to a complex, evolving environment.

This role is ideal for someone who thrives in ambiguity, enjoys untangling legacy systems, and can turn one-off solutions into repeatable, scalable processes.

What You’ll Be Doing

• Analyse and map application traffic flows across complex network environments
• Lead the discovery and onboarding of applications, including undocumented and legacy systems
• Design and implement secure access models aligned to Zero Trust principles
• Work hands-on with Zscaler or equivalent platforms (e.g. Netskope, Palo Alto Prisma Access)
• Define and standardise repeatable onboarding processes for applications
• Investigate and troubleshoot real-world application behaviour (file transfers, batch jobs, user access patterns)
• Collaborate with PMs and BAs while acting as the technical lead/driver
• Translate technical findings into clear, actionable outcomes for stakeholders

What We’re Looking For

Core Skills

• Strong networking expertise – deep understanding of traffic flow, routing, and application interaction
• A security-first mindset – experience with Zero Trust, segmentation, and access control
• Hands-on experience with Zscaler or similar (SSE/SASE, proxies, secure gateways)
• Solid application awareness – understanding how applications communicate and behave in real environments

Delivery & Approach

• Proven experience onboarding applications in complex or poorly documented environments
• Ability to move from ad hoc problem-solving to structured, repeatable processes
• Comfortable working independently with minimal direction
• Proactive, able to hit the ground running and take ownership

Problem Solving

• Strong analytical and investigative mindset
• Comfortable dealing with ambiguity and legacy complexity
• Practical, common-sense approach to diagnosing issues

Communication

• Confident communicator who can:
• Extract information from non-technical or disengaged stakeholders
• Clearly explain technical concepts and recommended actions

Applicants must be located in the UK.

Contract will be inside IR35.