Senior Network Engineer

IT WORLD LIMITED; England; On-site; GBP 70,000 - 78,000; Full time

Job summary

A global technology firm in London is seeking a Senior Network Site Reliability Engineer to enhance the reliability and performance of its network infrastructure. This role involves leading incident responses, troubleshooting critical issues, and driving automation initiatives while collaborating with various technology vendors. Applicants should have over 10 years of hands-on experience in network operations, troubleshooting across routing and security domains, along with proficiency in automation tools. Competitive salary ranging from £70,000 to £78,000.

Qualifications

• 10+ years in network engineering with hands-on experience.
• Expert in multi-vendor environments including Cisco and Palo Alto.
• Strong troubleshooting skills across network domains.

Responsibilities

• Lead incident management to resolve critical network issues.
• Diagnose complex problems across multiple network domains.
• Set the technical direction and mentor junior engineers.
• Participate in shift-based operations for network availability.
• Collaborate on innovation projects related to wireless design.

Skills

Minimum 10 years’ hands‑on experience in network engineering and operations

Deep expertise in routing, switching, firewalling, and wireless

Proficiency in Linux/Unix environments

Experience with automation and monitoring platforms

Ability to work independently and mentor others

Tools

Grafana

Splunk

Ansible

ServiceNow

Prometheus

Job description

We are seeking a highly experienced Senior Network Site Reliability Engineer (SRE) to join our global network operations team. This role is critical in ensuring the reliability, scalability, and performance of our network infrastructure. You will lead incident response, troubleshoot complex issues, and drive automation initiatives to maintain world‑class network services.

Required Skills

• Minimum 10 years’ hands‑on experience in network engineering and operations.
• Deep expertise in routing, switching, firewalling, and wireless across multiple vendors.
• Proficiency in Linux/Unix environments.
• Experience with automation and monitoring platforms.
• Ability to work independently, set technical direction, and mentor others.

Key Responsibilities

• Lead Incident Management: Own and resolve critical network incidents, manage outages, and provide expert guidance during high‑pressure situations.
• Advanced Troubleshooting: Diagnose and resolve complex issues across routing, switching, firewalling, and wireless domains.
• Technical Leadership: Set technical direction, mentor junior engineers, and foster a culture of operational excellence.
• 24/7 Operations: Participate in a shift‑based model to ensure continuous availability of critical network services.
• Multi‑Vendor Expertise: Operate across diverse environments including Arista, Cisco, Cumulus, Spectrum Ethernet, InfiniBand, Palo Alto, Check Point, Mist, Aruba, A10, Netscaler, and F5.
• Security & Segmentation: Support network segmentation, policy enforcement, and VPN solutions (GlobalProtect, AnyConnect).
• Automation & Observability: Utilize tools like Grafana, Big Panda, ServiceNow, ITMP, syslog, Splunk, Salt, Ansible, and Prometheus to enhance monitoring and automation.
• Innovation Projects: Collaborate on wireless design and AI cluster deployments to support cutting‑edge initiatives.

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City Of London, England, United Kingdom - Salary £70,000.00-£78,000.00