Job Description:

Who we are:

Modern Networks, established in 2000, is a growing IT Managed Service Provider (MSP) and Internet Service Provider (ISP) specialising in delivering services to the property management sector and commercial businesses nationwide. We work closely with customers to deliver a wide range of IT services, from endpoint technology to connectivity and telephony. Our partnerships with market‑leading vendors enable us to deliver first‑class services and solutions.

About the role

The Senior Core Network Engineer is a hands-on senior technical role responsible for the stability, performance, and ongoing improvement of the ISP core network and supporting platforms. You’ll work across operational support, technical project delivery, and network improvement activity, helping to maintain critical infrastructure, deliver change safely, and resolve complex issues when they arise. Working within the technical direction set by the Head of Technology & Engineering, you’ll also contribute to service improvements, automation, and the development of junior engineers. This role would suit an experienced network engineer who enjoys taking ownership, solving technical problems, and working in a live ISP environment.

What we’re looking for

• Strong experience working with ISP networking technologies, including BGP, MPLS, LDP, VRFs, L2VPNs, L3VPNs, PPPoE, OSPF and IPv6
• Extensive hands-on experience configuring and supporting Juniper MX and QFX platforms in a live production environment
• Proven ability to troubleshoot and resolve complex issues across a core network, with a structured and methodical approach to fault finding
• Experience delivering network change, upgrades and project work safely within a controlled production environment
• Good understanding of network performance, resilience and operational best practice within an ISP or service provider setting
• Experience supporting core network services and related virtualised or Linux-based infrastructure would be beneficial
• Comfortable producing clear technical documentation and detailed change requests
• Able to work independently, take ownership of technical problems, and contribute to wider engineering improvements
• Experience with RADIUS and TACACS would be beneficial
• Able to support junior engineers and explain technical concepts clearly to non-technical stakeholders
• Exposure to automation and open-source tooling would be an advantage

What you’ll get from us

• Great prospects - once you’ve got to grips with our systems and processes, you’ll have the opportunity to progress with us.
• Knowledgeable, high-achieving, experienced and fun colleagues
• A career with room for your personal life in a work environment where everyone knows the value of a healthy work-life-balance
• Commitment to Diversity and Inclusion - we hire great people from a wide variety of backgrounds, not just because it’s the right thing to do, but because it makes us stronger.
• 25 days annual leave + bank holidays

Interested?

If you share our values and our enthusiasm for delivering a world-class service, you will find a home here at Modern. Or, if you’re still not convinced, drop us a line at  – we’ll arrange an informal chat about the role.