Network Security Professional in Belfast

Job Type: Permanent

Salary: Competitive + Benefits

Locations considered: Hatfield (London from January 2027), Sheffield, Belfast

The successful candidate must be willing to undergo Government Security Clearance to SC level, which requires residence in the UK for a minimum of 5 years.

Why BT?

We’ve always been an organisation with purpose; to use the power of communications to make a better world. You can trace this back to our beginning as pioneers of the world’s first telecommunications company. At our heart we’re a technology company with research and innovation in our bones and a desire to be personal, simple, and brilliant for our customers - those are the values we live by whilst also creating an inclusive working environment where people from all backgrounds can succeed.

Our pursuit of progress over the past 180 years has established BT as a strong, successful brand, with huge scale capable of achieving great things. From supporting emergency services, hospitals, banks and keeping economies around the world online, safe and secure, to delivering large scale technology infrastructure like the creation of BT Sport.

Today in this fast changing, always on, digital world our purpose remains true. Yet the market conditions, regulation and competition we face are tougher than ever before. So, if you have the drive, optimism and resilience to help propel us forward we’ll offer unrivalled personal development, a wealth of opportunities to learn, experience new things and pursue new careers. If that’s you and what you’re looking for, we’d love you to be part of our future.

Why this role matters

Our purpose is to use the power of communication to make a better world. For each other, for our customers, for society and our communities. This role exists to provide specialist technical support on complex network security and cyber security deployments for any and all of our UK contracts. Building intimate working relationships and trust through effective communication and meeting expectation and deadlines is key. Liaising with customer representatives or vendors and directing other support staff where appropriate will form part of the role.

Additionally, the support of new products and services is an important part of keeping pace with the industry and customer requirements and allows BT to maintain market position as key supplier of services. The role holder will therefore be expected to provide support in this area, working with confidence and initiative and applying excellent self-management in order to promote successful outcomes.

What you’ll be doing

• Collaborating with a team of passionate engineers who share a commitment to building innovative, industry-leading platforms while continuously developing their own skills.
• Acting as a key decision-maker during cyber incidents, ensuring mitigation controls and response measures are effective and appropriate.
• Providing expert security advice and remediation guidance to BT’s Lines of Business and external customers.
• Owning and completing integration testing for new products and services, including producing all necessary supporting documentation.
• Proactively supporting your team leader and line manager to achieve team objectives.
• Maintaining full awareness of the importance of safeguarding sensitive customer information at all times, reinforcing BT’s reputation as a trusted organisation.

What skills you’ll need

• Hands-on engineering experience with at least one of the following: network and security platforms (e.g., Fortinet, Cisco ASA/FirePower, Palo Alto), cloud environments (Azure/AWS), or scripting languages (Python, Go, Bash). We value engineering talent over specific vendor or language expertise.
• Strong understanding of TCP/IP, the OSI seven-layer model, and how data networks are structured and operate.
• Solid knowledge of network security principles and best practices.
• Familiarity with native cloud security and operating systems such as Linux/Unix and Windows.
• Experience in Security Operations, ideally from a 2nd Line perspective.
• Awareness of modern engineering practices, including continuous delivery and integration.
• Ability to support team operations and maintain high levels of customer satisfaction.

Benefits

• 10% on target bonus
• BT Pension scheme, minimum 5% Employee contribution, BT contribution 10%
• From January 2025, equal family leave: receive 18 weeks at full pay, 8 weeks at half pay and 26 weeks at the statutory rate. It’s for all parents, no matter how your family is made up
• Enhanced women’s health support: including help with menopause symptoms, cancer screenings, period care and more
• 25 days annual leave (not including bank holidays), increasing with service
• 24/7 private virtual GP appointments for UK colleagues
• 2 weeks carer’s leave
• World-class training and development opportunities
• Option to join BT Shares Saving schemes

A Few Points To Note:

Although these roles are listed as full-time, if you’re a job share partnership, work reduced hours, or any other way of working flexibly, please still get in touch. We will also offer reasonable adjustments for the selection process if required, so please do not hesitate to inform us.

Don’t Meet Every Single Requirement: Studies have shown that women and people who are disabled, LGBTQ+, neurodiverse or from ethnic minority backgrounds are less likely to apply for jobs unless they meet every single qualification and criteria. We’re committed to building a diverse, inclusive, and authentic workplace where everyone can be their best, so if you’re excited about this role but your past experience doesn’t align perfectly with every requirement on the Job Description, please apply anyway - you may just be the right candidate for this or other roles in our wider team.