Sr. Network Engineer

We are looking for an experienced Senior Network Engineer to join our growing technology team in London. This is an excellent opportunity for a skilled networking professional who thrives in complex enterprise environments and enjoys designing, implementing, and maintaining secure, high-performing network infrastructure.

You’ll play a key role in supporting business-critical systems, driving infrastructure improvements, and ensuring the reliability, security, and scalability of our network operations while collaborating with cross-functional technical teams.

Key Responsibilities

• Design, implement, and maintain enterprise network infrastructure across LAN, WAN, WLAN, and cloud-connected environments.
• Configure and support routers, switches, firewalls, VPNs, and load balancers.
• Monitor network performance, identify bottlenecks, and implement proactive improvements.
• Troubleshoot complex network incidents and provide timely root cause analysis.
• Manage network security, access controls, and compliance with organisational security standards.
• Support high availability, disaster recovery, and business continuity initiatives.
• Lead infrastructure upgrades, migrations, and network optimisation projects.
• Create and maintain accurate technical documentation, network diagrams, and operating procedures.
• Collaborate with cybersecurity, cloud, infrastructure, and service desk teams to deliver reliable IT services.
• Mentor junior engineers and contribute technical expertise across the wider IT function.

• Proven experience as a Senior Network Engineer, Network Infrastructure Engineer, or similar role.
• Strong knowledge of enterprise networking technologies including TCP/IP, DNS, DHCP, VLANs, VPN, BGP, OSPF, and STP.
• Experience configuring and supporting Cisco, Juniper, Aruba, Fortinet, Palo Alto, or equivalent enterprise networking platforms.
• Hands-on experience with firewalls, network monitoring, and performance optimisation tools.
• Familiarity with cloud networking within Microsoft Azure or AWS environments.
• Experience with network security best practices and infrastructure resilience.
• Strong analytical, troubleshooting, and problem-solving skills.
• Excellent communication skills with the ability to work effectively across technical and non-technical teams., * Bachelor’s degree in Computer Science, Information Technology, Network Engineering, or a related discipline.
• Professional certifications such as CCNP, CCIE, JNCIP, Fortinet NSE, or equivalent are highly desirable.
• Experience working within ITIL-based environments is advantageous.

Pulled from the full job description

• Annual leave
• Free parking
• Company pension
• Casual dress
• On-site parking, * Competitive salary
• Performance-based bonus opportunities
• Pension scheme
• Generous annual leave entitlement
• Professional development and certification support
• Career progression within a collaborative technology team
• Modern working environment with access to enterprise technologies
• Employee wellbeing and assistance programmes

Equal Opportunities

We are committed to creating an inclusive workplace where everyone is treated fairly and with respect. Applications are welcomed from suitably qualified candidates regardless of age, disability, gender identity, marital status, race, religion or belief, sex, sexual orientation, or any other characteristic protected by applicable law.

If you are an experienced network engineering professional looking to make an impact within a forward-thinking organisation, we encourage you to apply and become part of our growing technology team.

Pay: £63,000.00-£65,500.00 per year