Senior CNS Engineer

Note: This role will involve working for public sector clients hence you may need to undergo an extensive background check process or security clearance process.

Meet the Team

Join our dedicated Customer Network Support (CNS) team supporting mission-critical enterprise and public sector customers with strict UK Data Sovereignty mandates. We serve as the vital bridge connecting sovereign customer environments with Cisco’s global technical ecosystem and worldwide TAC. Operating at the forefront of network engineering, high-stakes incident management, data governance, and AI-driven support operations, our team ensures customer networks run securely, reliably, and with full regulatory compliance.

Your Impact

As a Senior Network Support Engineer, you will act as the primary interface for customers with UK Data Sovereignty concerns into global Cisco support services. In this high-impact role, you will analyse and de-sensitise critical customer network data to safely route complex issues to the appropriate global Cisco Support and TAC teams, and serve as the conduit conveying remediation plans back to the customer for full resolution.

AI adoption and enablement are central to the delivery of this role. You will leverage AI-assisted tools, intelligent data sanitisation utilities, and modern analytics to accelerate incident triage, automate log de-sensitisation, enhance root-cause analysis, and drive operational efficiency. As a senior member of the team, you will also provide vital support and mentoring to fellow engineers—enforcing consistency, quality, and Continual Service Improvement (CSI) across all team service deliverables.

• Serve as the primary point of contact for network incidents, prioritising based on severity and business impact.
• Manage all technical cases to resolution, driving proactive communication and prompt restoration of service.
• Provide comprehensive incident management services for all high-severity support tickets raised by customers, ensuring appropriate technical escalation.
• Facilitate seamless communication and technical collaboration between customers and Cisco TAC for unresolved network incidents.
• Recreate and troubleshoot complex issues in lab environments to validate and test solutions.
• Prepare, manage, and de-sensitise critical customer data using automated and AI-assisted workflows to enable secure information transfer to global Cisco Support teams.
• Act as a technical coordinator during critical escalations, producing comprehensive incident reports, root-cause analyses, and stakeholder updates.
• Configure, diagnose, and troubleshoot technical issues logged by CNS customers across multi-vendor and Cisco enterprise environments.
• Issue and review Field Notices, Security Advisories (PSIRTs), End-of-Life/End-of-Sale (EOx) milestones, and software defects with customers.
• Collaborate with customers and third parties to mitigate vulnerabilities and strengthen network posture.
• Support monthly Customer Service Review meetings, presenting key performance findings and actionable service improvement recommendations.
• Identify and champion opportunities for Continual Service Improvement (CSI) across all operational workflows and service touchpoints.
• Provide dedicated support and mentoring to team members, driving high standards of technical excellence, process consistency, and AI tool adoption.

Minimum Qualifications

• Bachelor's Degree in Computer Science, Electrical/Computer Engineering, Information Technology, or equivalent relevant technical experience (6+ years in network engineering, technical support, or incident management operations).
• 5+ years of hands-on experience diagnosing, configuring, and troubleshooting enterprise networking technologies (Routing, Switching, Security, Cisco IOS-XE/NX-OS).
• Demonstrated practical experience applying AI tools, Large Language Models (LLMs), or machine learning utilities to technical workflows (such as log analysis, data sanitisation, script generation, or incident triage).
• Demonstrated experience with data handling protocols, customer data sanitisation/de-sensitisation techniques, and compliance within regulated or sovereign data frameworks.
• Proven experience managing high-severity network incident lifecycles, lab recreations, and technical escalations in complex enterprise environments.

Preferred Qualifications

• Cisco Professional or Expert Certifications (e.g., CCNP Enterprise / Security / Service Provider or CCIE written/lab).
• Active UK Security Clearance (SC/DV) or eligibility and willingness to undergo the UK national security vetting process.
• Experience building or customising AI prompts, automated data pipelines, or scripting (Python, Bash, APIs) for network operations, log scrubbing, and lab automation.
• Excellent executive communication, presentation, and technical writing skills with experience leading customer service review meetings.
• Proven track record of mentoring technical team members and embedding Continual Service Improvement (CSI) or ITIL best practices into service delivery.

At Cisco, we’re revolutionizing how data and infrastructure connect and protect organizations in the AI era – and beyond. We’ve been innovating fearlessly for 40 years to create solutions that power how humans and technology work together across the physical and digital worlds. These solutions provide customers with unparalleled security, visibility, and insights across the entire digital footprint.

Fueled by the depth and breadth of our technology, we experiment and create meaningful solutions. Add to that our worldwide network of doers and experts, and you’ll see that the opportunities to grow and build are limitless. We work as a team, collaborating with empathy to make really big things happen on a global scale. Because our solutions are everywhere, our impact is everywhere. 

We are Cisco, and our power starts with you.