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# Senior Network & Infrastructure Engineer

- **Company:** Clerkenwell
- **Location:** London, UK
- **Experience:** Expert
- **Contract:** Permanent contract
- **Skills:** Secure Shell (SSH), Wireless LAN, Dynamic Host Configuration Protocol, Disaster Recovery, Domain Name System (DNS), Internet Protocol Security (IP SEC), Intrusion Detection Systems, Virtual Private Networks (VPN), Network Security, Windows Servers, Network Monitoring, Routing, Network Service, Public Key Infrastructure, Remote Access Technology, TCP/IP, Virtualization Technology, VMware VSphere, Wide Area Networks, Network Routers, Transport Layer Security, Load Balancing, In-Plane Switching (IPS), Firewalls (Computer Science), Information Technology, Firewall Services Module
- **Published:** June 25, 2026
- **Apply:** https://www.apply4u.co.uk/jobs/x/39851034/

## About the Role

response as required What You'll Bring: Proven experience designing and supporting enterprise-level networks Strong knowledge of routing and core network services (TCP/IP, DNS, DHCP) Solid network security experience (firewalls, VPNs, encryption standards) Experience working in on-prem / operational environments where uptime matters Windows Server experience Virtualisation exposure (VMware vSphere or similar) is highly beneficial Certifications such as CCNP/CCIE, JNCIP (or equivalent) are advantageous Comfortable working on-site and being hands-on in a small IT team Why You Should Apply: Senior, hands-on role with real ownership of networks and infrastructure Small IT team where your work makes an immediate impact Visibility and support from senior stakeholders (including CEO involvement in IT) Stable, long-term environment within an established organisation Clear two-stage interview process with a practical or presentation element Ready to Apply? Contact Lewis Allen to find out more.
Please apply with a CV and a cover letter outlining why you're perfect for the role. Know someone great for the job? We offer a referral scheme-just get in touch! Note: We do our best to respond to every application, but due to volume, we can't always guarantee it. If you haven't heard back within 7 days, unfortunately, you haven't been successful this time. Keep an eye on our site for new opportunities! TPBN1_UKTJ

## Description

?? Senior IT Network & Infrastructure Engineer ?? West Wales (office-based, with occasional cover at a nearby secondary site) ?? £48,000 per annum (some flexibility for the right candidate) What You'll Do: Take ownership of the organisation's network and infrastructure across a busy on-site environment Design, implement and maintain LAN, WAN, WLAN and VPN solutions Configure and manage routers, switches, firewalls and load balancers Lead network upgrades, migrations and infrastructure improvement projects Deliver secure remote access (VPN, IPsec, SSL/TLS, SSH) Drive network security best practice including firewall rules, IDS/IPS, encryption and PKI Monitor network performance, capacity and security and troubleshoot complex issues Support disaster recovery and business continuity planning for network services Manage patching, configuration backups and documentation Provide technical guidance and support to a junior IT support colleague Participate in on-call support and incident


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