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.
- Juniper Certified
