Network Security Engineer

2 days ago

London, Greater London, United Kingdom Stott and May Full time £60,000 - £120,000 per year

Job Description
Network Security Engineer (Zscaler – ZPA/ZIA)
Location:
London (Hybrid - 1 day onsite)

Type:
Contract (6 Months)

Day Rate:
GBP
(Inside IR35)
Start Date:
ASAP

The Role
We are seeking an experienced
Network Security Engineer
to lead the design, deployment, and management of
Zscaler ZPA and ZIA
solutions across our enterprise network. This is a hands-on role requiring deep technical expertise, with the opportunity to shape and secure network access for both cloud and on-premises environments. You will work closely with IT, security, and compliance teams to deliver secure, scalable, and policy-compliant infrastructure.

Key Responsibilities

  • Design, deploy, and manage Zscaler ZPA and ZIA solutions across the organisation.
  • Integrate Zscaler platforms with identity providers (IdPs), SIEM tools, and endpoint security platforms.
  • Monitor and optimise Zscaler configurations, including policies, access rules, and application segments.
  • Troubleshoot and resolve issues relating to DNS filtering, SSL inspection, traffic forwarding, and secure access.
  • Collaborate with cross-functional teams to ensure secure and compliant network architecture.
  • Maintain up-to-date documentation for all relevant Zscaler configurations and operational procedures.
  • Stay informed on emerging threats, platform updates, and industry best practices.
  • Troubleshoot application connectivity within cloud environments.
  • Use basic Linux commands for script execution, key updates, cron job management, and connection troubleshooting.
  • Contribute to the design and documentation of on-premises, cloud, and ZPA network architecture, ensuring alignment with security best practices.

Essential Skills & Experience

  • Minimum 8 years' experience in network security or a closely related discipline.
  • At least 2 years of hands-on experience with Zscaler ZPA and ZIA.
  • Strong understanding of TCP/IP, DNS, VPNs, firewalls, and proxy technologies.
  • Proven experience with cloud platforms such as AWS, Azure, or GCP, and working knowledge of Zero Trust architecture.
  • Familiarity with identity and access management (IAM) and SAML/SSO integrations.
  • Proficient in the use of network and security monitoring tools such as Wireshark, Splunk, or similar.
  • Good understanding of routing protocols, such as OSPF and BGP.
  • Strong problem-solving abilities and effective communication skills.

Desirable Skills

  • Zscaler certifications (e.g. ZCCA-IA, ZCCA-PA, or Zscaler Certified Cloud Professional).
  • Experience with network automation or scripting (e.g. Python, PowerShell, Bash).
  • Familiarity with infrastructure-as-code tools, such as Terraform or Ansible.
  • Understanding of SASE (Secure Access Service Edge) frameworks.
  • Exposure to cloud security standards (e.g. CIS Benchmarks, NIST, CSA).
  • Experience with ITSM tools like ServiceNow.
  • Knowledge of endpoint protection platforms (e.g. CrowdStrike, SentinelOne).
  • Working knowledge of Active Directory and Azure Active Directory.
  • Involvement in security audits or compliance assessments.
  • Understanding of regulatory frameworks such as ISO 27001, GDPR, or SOC 2.
  • Experience supporting global enterprise networks.
  • Previous experience working in a regulated industry such as finance, healthcare, or government.

Please email your CV to [email protected] for immediate consideration.

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