Senior Network Support Engineer | Cisco

Senior Network Support Engineer | Cisco

Professional Development + Health & Wellbeing Programme + Flexible Benefits

** Eligibility for Security Clearance (SC) and Police Personnel Vetting (PPV3) is required. Applicants must have a minimum of 5 consecutive years' UK residency or working history. **

The Role In a Nutshell

When the most complex data network faults land on the desk, you're the person who resolves them. This is a high-visibility third line position at the technical heart of a large-scale enterprise connectivity operation, diagnosing and fixing the hardest MPLS, SD-WAN, and Cisco network faults in a demanding, SLA-driven environment where your expertise genuinely matters.

The Business

One of Europe's leading enterprise connectivity businesses, serving over a million business customers internationally across sectors including enterprise, government, and public services. Operating at this scale means the technical challenges are real, the infrastructure is complex, and the career development opportunities are exceptional. This is a business that invests in its people and gives talented engineers the visibility and progression they deserve.

The Role

You'll join a specialist third line faults team as the primary escalation point for complex data network service issues. Your work centres on diagnosing and resolving faults across large-scale enterprise WAN environments - including MPLS and SD-WAN, using advanced tooling and deep technical knowledge. You'll collaborate across technical teams, liaise with senior management to communicate findings, and contribute to continuous service improvement.

This isn't a passive support role. You'll proactively identify fault patterns, stay ahead of developments across Cisco, Palo Alto, Fortinet, Aruba, and Juniper platforms, and take ownership of driving service quality in a high-stakes environment. Career progression and internal visibility are genuine and built into the fabric of this team.

Skills & Experience

• Proven experience in data network engineering, network service assurance, or a comparable 3rd line technical role
• CCNP certification or active progress toward it (preferred)
• Solid working knowledge of MPLS and SD-WAN technologies
• Multi-vendor WAN experience across Palo Alto, Fortinet, Aruba, or Juniper
• Experience in service desk or tiered support environments (1st, 2nd, and/or 3rd line)
• Eligibility for Security Clearance (SC) and Police Personnel Vetting (PPV3)

The following would be an advantage:

• Bachelor's degree in Computer Science, IT, or a related field
• Familiarity with ITIL or structured service management frameworks

Your Responsibilities

• Resolve third line data network faults within agreed SLAs as the primary technical escalation point
• Diagnose and troubleshoot complex network issues using advanced diagnostic tools and deep domain expertise
• Maintain expert-level knowledge of enterprise WAN architectures including MPLS and SD-WAN
• Collaborate with service desk and engineering teams to elevate and close incidents effectively
• Liaise with senior management to communicate technical findings and support service improvement initiatives
• Stay current with emerging WAN technologies and vendor developments across Cisco, Palo Alto, Fortinet, Aruba, and Juniper
• Maintain compliance with security protocols and fulfil SC clearance and PPV3 requirements

Other skills required:

• Technical Depth - Ability to diagnose and resolve complex, low-level network faults in high-pressure, SLA-driven environments without relying on scripts or playbooks
• Stakeholder Communication - Confidence to translate complex technical findings into clear, actionable language for senior management and non-technical audiences
• Collaborative Working - Proven track record of coordinating across multi-team environments, sharing knowledge and driving incident resolution under pressure
• Improvement Mindset - Proactive approach to identifying fault patterns and contributing to lasting improvements in network service quality
• Performance-based bonus
• Professional development and training opportunities
• Flexible working arrangements
• Comprehensive health and wellbeing programme

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