As a Senior IP Security Engineer, you'll play a critical role in keeping Virgin Media O₂'s enterprise and security infrastructure running securely, reliably and around the clock. Supporting a large-scale network estate, you'll act as a technical expert within the team, resolving complex issues, restoring services, and helping ensure our customers and partners remain connected without interruption. Based within our Core Operations team, you'll work across a diverse range of technologies including enterprise networks, firewalls, DNS, VPN platforms and cloud-based infrastructure.

This is a hands-on engineering role where you'll take ownership of high-priority incidents, contribute to the introduction of new technologies, and proactively drive improvements that enhance both network performance and customer experience. You'll collaborate with technical teams, vendors and stakeholders across the business, while also coaching and mentoring colleagues to build capability within the team. As part of the role, you'll participate in a 24/7 on-call rota supporting critical IP and security services.

At Virgin Media O₂, we connect people to the moments that matter most. Virgin Media leads the UK for broadband reliability, speed and overall performance, while O₂ keeps people connected on the move with award-winning coverage.

We’re also proud to be named one of the Financial Times Top 500 Best Employers for 2026, based on one of the UK’s largest employee satisfaction surveys.

Join us and you’ll be part of a team that stays curious, positive and focused on making life easier for our customers and each other. We’re investing in the future of connectivity, from expanding next-generation 5G to exploring satellite-supported solutions that help reach rural communities and hard-to-connect places.

You’ll work with people who back good ideas and give you plenty of room to grow. So if you’re looking for a place where you can feel supported, trusted and genuinely valued, you’ll feel right at home here.

Our ways of working

We’re a flexible-first organisation, because we know people do their best work when they have choice and clarity. To support meaningful collaboration, we ask everyone to spend at least eight days a month connecting with each other in person.That doesn’t just mean time in the office – it could be team meetings, offsites, volunteering days, cross-functional projects, or away days. What matters is making those moments count – so when we come together, it benefits everyone.

In order to be considered, you must have the following experience;

• Proven experience supporting large scale IP network infrastructure in an enterprise environment
• Strong knowledge of network technologies including firewalls, DNS and security platforms
• Demonstrated ability to troubleshoot and resolve complex technical issues
• Experience working in a 24x7 operational support environment with on call responsibilities
• Ability to coordinate service restoration and lead technical response in high pressure situations

We'd also love you to bring;

• Industry certifications such as CCNP, CCISP or equivalent
• Experience working within a telecommunications environment
• Exposure to cloud network technologies such as Juniper private cloud solutions
• Ability to communicate complex technical issues to non technical stakeholders
• A proactive mindset with a focus on continuous improvement and mentoring others

We know life isn’t just about work, so our benefits are built to support you in the moments that matter. You’ll get Bupa healthcare, wellbeing support, life cover, a pension and generous holiday –plus your birthday off.

And there’s more. Enjoy some extra perks on us, with optional electric vehicle lease and Cycle2Work schemes, dental insurance, neurodiversity assessments, and brilliant discounts on broadband, TV and mobile. You’ll even get access to the Virgin Family platform and the O₂ Priority app, with exclusive rewards, experiences and chances to attend events at The O₂ and beyond.

If this feels like a place where you can belong, we’d love to see what you can do. Once you apply, the next steps might include a call with a recruiter, a video interview, an interview with the hiring manager and a task or assessment.

We’ll also ask about any adjustments you might need, and we’ll do our best to make them happen.

We review applications and interview throughout the advert window, so it’s worth applying sooner rather than later. If you’re offered the role, the offer will be subject to background checks, including a criminal record check and, for some roles, a financial background check.