L3 Network Engineer – Security Proxy, Juniper, Cisco
Location: London Heathrow Waterside
Contract: 12 months
Experience: 6-10+ years
Job Responsibilities
* Provide L3-level support, troubleshooting, and resolution for complex network issues.
* Design, implement, and optimize network security solutions using security proxies, Juniper, and Cisco.
* Lead incident resolution and problem management efforts, coordinating with vendors as needed.
* Configure and maintain firewalls, security appliances, and access control policies.
* Develop and execute network automation strategies for efficiency and scalability.
* Collaborate with architects and project teams on network upgrades and expansions.
* Conduct performance tuning and capacity planning for network infrastructure.
* Mentor and provide technical guidance to L2 engineers.
Technical Skills
* Security Proxy: Blue Coat, Zscaler, or equivalent, deep understanding of SSL decryption and policy enforcement.
* Juniper: Advanced routing (BGP, OSPF, ISIS), firewall rules, security policies, IDS/IPS.
* Cisco: Enterprise switching (Nexus, Catalyst), routers, ASA/FTD firewalls, SD-WAN.
* Automation & Scripting: Python, Ansible, Terraform (preferred).
* Cloud Networking: Azure, AWS, or GCP networking and security concepts.
* Load Balancing: F5, Citrix NetScaler (preferred).
* SIEM & Security Tools: Splunk, Palo Alto Cortex, or similar.
Soft Skills
* Strong leadership and mentorship capabilities.
* Excellent documentation and presentation skills.
* Ability to work independently and handle high-priority incidents.
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