At a Glance
- Tasks: Audit and document complex network systems while remediating non-standard configurations.
- Company: Join a leading tech firm committed to inclusivity and innovation.
- Benefits: Flexible hybrid work, competitive pay, and opportunities for professional growth.
- Other info: Collaborative environment with a focus on career development and diversity.
- Why this job: Be a key player in transforming legacy networks and enhancing security.
- Qualifications: Expertise in Cisco Routing & Switching and strong troubleshooting skills required.
The predicted salary is between 60000 - 84000 £ per year.
Contract | Comgent | United Kingdom
Posted On 03/09/2026
Standard Business working Hours: Yes
Work Experience: 8-10 years
City: London
State/Province: City of London
Special Considerations: We are committed to building an inclusive workplace and encourage applications from women and other under-represented groups in tech. All qualified candidates are welcome.
Start date: Apr/ May 2026
Location: London, UK (Hybrid — minimum 2 days per week in office)
Job Description: Working closely with the Senior Network Architect, this hands‑on engineering role is focused on the practical remediation and documentation of a complex, legacy Cisco environment. The successful candidate will be a routing expert capable of diagnosing and unpicking unconventional protocol configurations, building standards‑compliant designs, and supporting the convergence of two network environments.
Key responsibilities:- Audit and document the existing network estate (~1,000 devices across both banking entities)
- Identify and remediate non‑standard routing configurations, including atypical EIGRP deployments
- Define and implement standardised change categories, change risk classifications, and change management templates
- Support the transition from hybrid ACI to target‑state architecture
- Develop network documentation and operational runbooks
- Provide detailed input into the network baseline assessment
- Act as a subject matter expert during change approval board (CAB) reviews
- Work with managed service providers to ensure designs and standards are followed during implementation.
- Must have Expert‑level Cisco Routing & Switching: IOS, IOS‑XE, NX‑OS
- Hands‑on experience with Cisco Nexus platforms (2K, 5K, 7K, 9K)
- Deep routing protocol knowledge: EIGRP, OSPF, BGP — including troubleshooting of complex or misconfigured environments
- Familiarity with Cisco ACI and spine‑leaf fabric architectures
- Proficiency with network documentation tools and diagramming
- Experience working in dual‑stack (legacy + modern) environments
- Understanding of network security segmentation and firewall integration
- CCIE or CCNP (Routing & Switching or Data Centre)
- Automation/scripting experience (Python, Ansible, or similar)
- Experience in financial services or similarly regulated environments
- Detail‑oriented with a methodical approach to problem diagnosis
- Able to produce clear, well‑structured technical documentation
- Comfortable working in a fast‑paced environment with competing priorities
- Constructive and collaborative when working with legacy team members and external managed service providers
Senior Network Engineer (Routing & Switching Specialist) - freelance - hybrid, London, UK employer: Comgent
At Comgent, we pride ourselves on fostering a dynamic and inclusive work environment that empowers our employees to thrive. As a Senior Network Engineer in London, you'll benefit from a hybrid working model, competitive remuneration, and opportunities for professional growth within a collaborative team dedicated to innovation in technology. Join us to make a meaningful impact while enjoying the vibrant culture of one of the world's leading financial hubs.
StudySmarter Expert Advice🤫
We think this is how you could land Senior Network Engineer (Routing & Switching Specialist) - freelance - hybrid, London, UK
✨Network Your Way In
Get out there and connect with people in the industry! Attend networking events, join online forums, or even reach out to folks on LinkedIn. We all know that sometimes it’s not just what you know, but who you know that can help land that dream job.
✨Show Off Your Skills
When you get the chance to chat with potential employers, don’t hold back! Share your hands-on experience with Cisco Routing & Switching and any cool projects you've worked on. We want to see your passion and expertise shine through!
✨Prepare for Technical Interviews
Brush up on your technical knowledge and be ready to tackle some tricky questions. We recommend practising common scenarios related to EIGRP, OSPF, and BGP. The more prepared you are, the more confident you'll feel during those interviews!
✨Apply Through Our Website
Don’t forget to apply directly through our website! It’s the best way to ensure your application gets seen by the right people. Plus, we love seeing candidates who take the initiative to engage with us directly.
We think you need these skills to ace Senior Network Engineer (Routing & Switching Specialist) - freelance - hybrid, London, UK
Some tips for your application 🫡
Tailor Your CV:Make sure your CV is tailored to the Senior Network Engineer role. Highlight your expert-level Cisco Routing & Switching skills and any hands-on experience with Cisco Nexus platforms. We want to see how your background aligns with the job description!
Showcase Your Experience:In your application, don’t just list your past roles—describe your achievements! Focus on your experience with EIGRP, OSPF, and BGP, and how you've tackled complex routing issues. We love seeing real-world examples of your problem-solving skills.
Be Clear and Concise:When writing your cover letter or any additional documentation, keep it clear and concise. Use straightforward language to explain your technical expertise and how you can contribute to our team. We appreciate a well-structured approach!
Apply Through Our Website:We encourage you to apply through our website for the best chance of getting noticed. It’s super easy, and you’ll be able to showcase your skills directly to us. Don’t miss out on this opportunity!
How to prepare for a job interview at Comgent
✨Know Your Tech Inside Out
Make sure you brush up on your Cisco Routing & Switching knowledge. Be ready to discuss your hands-on experience with Cisco Nexus platforms and deep routing protocols like EIGRP, OSPF, and BGP. Prepare to troubleshoot complex scenarios, as they might throw some tricky questions your way!
✨Document Your Success Stories
Since this role involves a lot of documentation and operational runbooks, come prepared with examples of how you've successfully audited and documented network estates in the past. Highlight any experience you have with standardising change management processes, as this will show your attention to detail.
✨Show Your Collaborative Spirit
This position requires working closely with various teams, including managed service providers. Be ready to share examples of how you've collaborated in the past, especially in fast-paced environments. Emphasise your constructive approach when dealing with legacy team members to demonstrate your adaptability.
✨Prepare for Scenario-Based Questions
Expect scenario-based questions that test your problem-solving skills in unconventional protocol configurations. Think about past experiences where you had to diagnose and remediate non-standard routing setups. Practising these scenarios can help you articulate your thought process clearly during the interview.
