L2/L3 Network Security Engineer

Lakarya; West of England; On-site; GBP 55,000 - 90,000; Full time

Job summary

Lakarya is seeking an L2/L3 Network Security Engineer for a 6-month contract in London Heathrow Waterside. The ideal candidate will have 6-10+ years of experience, providing L3 support, and implementing security solutions using Juniper and Cisco technologies. The role emphasizes strong technical skills in security proxies, troubleshooting, and incident management, while also mentoring junior engineers.

Qualifications

• 6-10+ years of experience in network security.
• Strong technical skills in Juniper and Cisco technologies.
• Experience with security proxies and incident management.

Responsibilities

• Provide L3-level support for complex network issues.
• Design and implement network security solutions.
• Mentor L2 engineers and lead incident resolution.

Skills

Leadership

Documentation

Problem Solving

Network Security

Automation

Tools

Python

Ansible

Terraform

SSL

Job description

Lakarya Waterside, England, United Kingdom

L2/L3 Network Security Engineer

Lakarya Waterside, England, United Kingdom

3 days ago Be among the first 25 applicants

Direct message the job poster from Lakarya

Experienced HR Professional Specializing in Talent Acquisition and Employee Relations | Driving Organizational Success in the US Market

L2/L3 Network Engineer – Security Proxy, Juniper, Cisco

Location: London Heathrow Waterside

Contract 6 months contract

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.

Seniority level

• Seniority level

  Mid-Senior level

Employment type

• Employment type

  Contract

Job function

• Job function

  Information Technology

• Industries

  IT Services and IT Consulting

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