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For Companies At a Glance
- Tasks: Design and support secure Cisco-based network infrastructure in data centres and enterprises.
- Company: Join a leading tech firm focused on innovation and collaboration.
- Benefits: Attractive salary, health perks, remote work options, and growth opportunities.
- Why this job: Make a real impact by enhancing network reliability and performance.
- Qualifications: Experience in network engineering with strong Cisco and VMware skills.
- Other info: Dynamic role with mentorship opportunities and a focus on best practices.
The predicted salary is between 36000 - 60000 £ per year.
We are hiring a Senior Network Infrastructure Engineer to design, support and improve secure, resilient Cisco-based network infrastructure across data centre and enterprise environments. This role is hands-on (routing/switching, troubleshooting, implementation) and also requires strong stakeholder engagement/outreach – working across teams to drive standards, reduce risk, and deliver reliable services.
Key Responsibilities
- Cisco Network Engineering
- Design, implement and support Cisco LAN/WAN/WLAN infrastructure in production environments.
- Configure and troubleshoot routing/switching and core services (e.g., VLANs, ACLs, NAT, DNS/DHCP, IP addressing).
- Deliver resilient/HA designs and improvements (capacity planning, performance tuning, lifecycle upgrades).
- Own high-severity incident troubleshooting and root-cause analysis; produce clear fixes and preventative actions.
- Data Centre & Infrastructure
- Support and enhance data-centre network/infrastructure (rack/stack coordination, cabling standards, patching, cross-connects, uplinks, resilience).
- Work with compute/storage/platform teams to ensure stable end-to-end service delivery across physical and virtual estates.
- Contribute to operational best practice: documentation, change control, maintenance windows, and service improvements.
- VMware (Virtualisation)
- Provide strong operational support for VMware environments (vSphere/ESXi/vCenter).
- Troubleshoot issues spanning virtual networking and physical networking, including performance and connectivity bottlenecks.
- Support cluster operations (HA/DRS concepts, upgrades, templates, patching coordination).
- Outreach / Stakeholder Engagement
- Build strong working relationships across Infrastructure, Service Desk, Security and Delivery teams.
- Translate technical issues into clear business impact and actions for non-technical stakeholders.
- Mentor junior engineers and raise standards around documentation, handover quality and engineering discipline.
Required Skills & Experience
- Proven experience as a Senior Network / Infrastructure Engineer in an enterprise environment.
- Strong Cisco background (core routing/switching and enterprise troubleshooting).
- Solid data centre experience supporting business-critical infrastructure.
- Strong VMware knowledge (vSphere/ESXi/vCenter) and ability to troubleshoot across virtual + physical layers.
- Comfortable owning incidents, changes and improvements end-to-end with excellent communication skills.
- Able to work independently, prioritise effectively, and engage stakeholders proactively.
Desirable / Nice to Have
- Firewall / security networking experience (Cisco ASA/Firepower, Palo Alto, Fortinet, etc.).
- WAN/SD-WAN exposure and multi-site connectivity patterns.
- Monitoring tooling (SNMP/NetFlow/syslog), packet capture, and performance analysis.
- Automation/scripting (Python, PowerShell, Ansible/Terraform) and documentation mindset.
- Relevant certifications (CCNP, CCIE, VMware VCP) - not required.
Please send me your most recent CV so that we can discuss details further.
Senior Network Infrastructure Engineer in London employer: iO Associates
Contact Detail:
iO Associates Recruiting Team
StudySmarter Expert Advice 🤫
We think this is how you could land Senior Network Infrastructure Engineer in London
✨Tip Number 1
Network with industry professionals! Attend meetups, webinars, or conferences related to network infrastructure. This is a great way to make connections and learn about job openings that might not be advertised.
✨Tip Number 2
Show off your skills in practical settings. Consider contributing to open-source projects or creating your own networking lab at home. This hands-on experience can really set you apart during interviews.
✨Tip Number 3
Prepare for technical interviews by brushing up on your Cisco and VMware knowledge. Practice common troubleshooting scenarios and be ready to discuss your past experiences in detail.
✨Tip Number 4
Don’t forget to apply through our website! We’re always looking for talented individuals like you, and applying directly can sometimes give you an edge over other candidates.
We think you need these skills to ace Senior Network Infrastructure Engineer in London
Some tips for your application 🫡
Tailor Your CV: Make sure your CV highlights your experience with Cisco, data centre environments, and VMware. We want to see how your skills match the role, so don’t be shy about showcasing your relevant projects and achievements!
Showcase Your Problem-Solving Skills: Since this role involves troubleshooting and incident management, include examples of how you've tackled high-severity incidents in the past. We love seeing clear, concise explanations of your thought process and the outcomes.
Engage with Stakeholders: Demonstrate your ability to communicate technical issues to non-technical stakeholders. We value strong relationships across teams, so share any experiences where you’ve successfully translated complex concepts into actionable insights.
Apply Through Our Website: We encourage you to apply directly through our website for a smoother application process. It’s the best way for us to receive your application and get the ball rolling on your journey with StudySmarter!
How to prepare for a job interview at iO Associates
✨Know Your Cisco Inside Out
Make sure you brush up on your Cisco knowledge, especially around routing and switching. Be prepared to discuss specific configurations you've worked on and how you've tackled troubleshooting in past roles.
✨Showcase Your Data Centre Experience
Be ready to share examples of how you've supported data centre infrastructure. Talk about your experience with rack/stack coordination and how you've ensured resilience in your previous projects.
✨Demonstrate Stakeholder Engagement Skills
Prepare to discuss how you've built relationships across teams. Think of examples where you've translated technical issues into business impacts for non-technical stakeholders, as this is crucial for the role.
✨Highlight Your VMware Expertise
Since VMware knowledge is key, be ready to dive into your experience with vSphere, ESXi, and vCenter. Discuss any challenges you've faced in virtual networking and how you've resolved them.
