Network Security Engineer (Island Enterprise Browser)

Our key client is looking for a Network Security Engineer to lead the implementation, engineering and operational support of Island Enterprise Browser services across enterprise environments.

As an experienced Network Security Engineer, you will play a key role in designing, implementing, securing, and optimising enterprise network security services across on-premises, cloud, and hybrid environments.

Your expertise will be utilised to strengthen the organisation's cyber defence capabilities, drive network security innovation, automate security operations, and ensure resilient, secure, and scalable connectivity solutions.

You will work closely with architecture, engineering, operations, cloud, and business teams to deliver secure network services, respond to emerging threats, and support the adoption of modern network security technologies. The role requires a strong focus on automation, continuous improvement, operational excellence, and adherence to security and regulatory requirements.

Primary Responsibilities

Network Security Engineering & Delivery Lead the implementation, engineering and operational support of Island Enterprise Browser services across enterprise environments. Develop and maintain browser security policies to protect sensitive data, secure third-party access and support workforce mobility initiatives. Collaborate with Security Architecture, End User Computing, Identity & Access Management and Security Operations teams to deliver secure browser-based access solutions. Support browser modernisation initiatives that replace traditional VPN and endpoint-centric security controls with Zero Trust access models. Design, implement, and maintain secure enterprise network infrastructure and security controls aligned to organisational strategy and security standards. Drive network security enhancements and modernisation initiatives within agreed budgets, timelines, and risk appetites. Support the delivery of secure connectivity solutions across cloud, on-premises, and hybrid environments. Collaborate with architects and engineers to develop High Level Designs (HLDs) and Low Level Designs (LLDs) into operational solutions.

Standard Technical Skills & Competencies

Strong understanding of SWG controls

Island Enterprise Browser, extension and agent engineering Strong understanding of TLS interception

Proxy & Secure Web Gateway Technologies Zero Trust Network Access (ZTNA)

Strong understanding of authentication method at enterprise level

Strong understanding of content controls (request and response mode)

Network Security Automation (Python, PowerShell, APIs, Terraform) Cloud Security & Secure Connectivity

Identity Integration (Entra ID, Conditional Access, MFA)Enterprise Browser & Secure Access Technologies & Security Policy Management Hands-on experience implementing, configuring and supporting Enterprise Browser solutions, including Island Browser or equivalent secure enterprise browser technologies.

Design and implement browser-based security controls to support Zero Trust security principles, secure remote access, data protection and policy enforcement. Configure and manage browser security policies including:

oData Loss Prevention (DLP)

oClipboard controlsoFile upload and download restrictionso Browser isolation controls

oSession protection

o Watermarking

oSecure application access controls

Experience integrating Enterprise Browser platforms with:oDownstream SWGoMicrosoft Entra IDoMulti-Factor Authentication (MFA)oConditional AccessoSecurity Information and Event Management (SIEM) platforms

Strong understanding of browser-based security architecture, enterprise endpoint security and secure access governance.

Experience troubleshooting browser policy enforcement, application compatibility, authentication integration and user adoption challenges.

Knowledge of Browser Isolation, Secure Enterprise Browsing, Zero Trust Access and Secure Workspace technologies.
Network Security Operations Strong operational experience supporting enterprise network security environments.

Experience managing security incidents, policy changes, exceptions, and operational support within regulated organisations.

Understanding of compliance management, governance processes, audit requirements, and regulatory controls.

Experience working within ITIL-aligned Incident, Problem, Change, and Service Management frameworks.Security Automation & Engineering

Experience automating network security processes, including:

oRule lifecycle management

oPolicy validation

oCompliance reporting

oSecurity control enforcement

oOperational workflows

Proficiency in PowerShell, Python, Bash, and API-based integrations to support automation objectives.

Experience with automation platforms and configuration management tools such as Ansible, Terraform, Chef, or equivalent solutions.Additional

Professional Competencies

Strong stakeholder management and relationship-building skills across technical and executive audiences.

Ability to influence and drive security improvements across infrastructure, cloud, engineering, and operational teams.

Strong analytical approach to risk identification, remediation, and operational optimisation.

Excellent written and verbal communication skills with the ability to present complex technical issues in a clear and concise manner.

Demonstrated ability to balance security, operational resilience, regulatory obligations, and business requirements.

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