Network Security Engineers

BT Communications Ireland Limited; Manchester; On-site; GBP 60,000 - 85,000; Full time

Benefits offered by this job

Competitive salary

10% bonus

Private GP 24/7

Pension scheme

Job summary

BT plc is seeking Network Security Engineers to join a 24/7 operations team in Manchester. You will provide hands-on 2nd-line support across a complex multi-vendor security environment, diagnose incidents, and implement changes to keep customer networks secure and available.

Candidates should have hands-on security expertise and be eligible for UK security clearance. The role offers a competitive package with benefits and opportunities to grow in a large-scale defensive environment within BT

Qualifications

• Hands-on experience supporting 24/7 network security operations.
• Strong troubleshooting of network/security incidents including P1/P2.
• Experience with enterprise security technologies (firewalls, VPNs, threat protection).

Responsibilities

• Provide 2nd-line network security support across multi-vendor environments.
• Diagnose and resolve security incidents and outages, escalate as needed.
• Implement approved security changes following ITIL/change governance.

Skills

Hands-on network security

Palo Alto Firewalls

Incident troubleshooting

Tools

Palo Alto Panorama

F5 Load Balancers

Netskope

Job description

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Job Title: Network Security Engineers Req ID: 63673 Job Function: Cyber Security Posting Start Date: 11/11/2026 Posting End Date: 29/11/2026 Division: UK Business Job Location: GBR-Manchester-New Bailey Advertised Salary: Competitive + Benefits Job Req ID: 63673 Function: Security Positions: 8 roles available Shift work: 24/7 shift pattern Base location: Manchester - lives within a commutable distance i.e Leeds, Sheffield, Liverpool, Derby SECURITY CLEARANCE: This role requires Security Check (SC) clearance. Due to the security requirements of the role, applicants must be sole UK nationals and have been continuously resident in the UK for a minimum of five years.

About the role

Our network security team is growing, we have 8 positions available to support one our major security defence partnerships.

As our Network Security Engineers you’ll play a hands‑on role in protecting and supporting critical customer network environments.

Working within our Secure Networks team, you’ll provide 2nd‑line technical support across a complex, multi‑customer and multi‑vendor security environment. You’ll diagnose and resolve network security incidents, implement approved changes and help ensure our customers’ services remain secure, stable and available.

You’ll work across technologies including firewalls, VPNs, secure connectivity and threat protection, taking ownership of operational issues and working with specialist teams when deeper technical expertise is required.

This is a great opportunity for an experienced Network Security Engineer who enjoys hands‑on troubleshooting and wants to develop their security expertise in a large‑scale operational environment.

Security requirement: This role supports a major UK defence security partnership. You must therefore be eligible to obtain the required UK Security Clearance and be a sole UK national passport holder, having sole residency in the UK for a minimum of 5 years.

What you’ll be doing

Providing hands‑on 2nd‑line Network Security support, diagnosing and resolving incidents affecting customer services.

Taking ownership of security incidents, including P1/P2 incidents, troubleshooting issues through to resolution and escalating to specialist teams where required.

Implementing approved network security changes in line with established change, risk and governance processes.

Supporting the security, stability and availability of customer environments, proactively identifying and resolving operational issues.

Working across technologies including firewalls, VPNs, secure connectivity and threat protection.

Supporting complex multi‑customer and multi‑vendor environments, working collaboratively with internal technical teams and external stakeholders.

Providing clear technical updates to customers, colleagues and stakeholders during incidents and operational activity.

Applying ITIL and service‑management practices across incident and change activities.

Maintaining accurate technical and operational documentation and sharing knowledge across the wider team.

Identifying opportunities to improve operational efficiency, service stability and customer experience.

Maintaining high standards of information security, data protection, risk management and customer confidentiality.

Essential Skills / Experience

We're looking for three core areas of experience:

1. Hands‑on network security experience Experience supporting network security technologies in a live 24/7 Network Security Operations environment, with practical knowledge of Palo Alto Firewalls, Palo Alto, Panorama, F5 Load Balancers and Web Application Firewall, Forescout NAC, Netskope, VPN and secure connectivity technologies.
2. Network security incident troubleshooting and resolution Strong hands‑on troubleshooting experience diagnosing and resolving network or network security incidents, including experience supporting high‑priority P1/P2 incidents and taking issues through to resolution or appropriate technical escalation.
3. Technology Experience across some of the following technologies; Palo Alto Firewalls, Palo Alto, Panorama, F5 Load Balancers and Web Application Firewall, Forescout NAC, Netskope, VPN and secure connectivity technologies

Desirable Skills and Experience

It would be great if you have experience with some of the following:

• Experience implementing technical changes within established change, risk and governance processes, ideally within a complex, multi‑vendor or multi‑customer environment, with an understanding of ITIL/service‑management practices.
• Industry‑recognised networking or security certifications, such as Palo Alto qualifications, or equivalent practical experience

You’ll also be someone who takes ownership, remains calm when dealing with high‑priority incidents and approaches troubleshooting in a structured and methodical way.

You’ll communicate technical information clearly, collaborate well with others and be motivated to continue developing your network security expertise.

Our Package

Tailored benefits make a real difference. That’s why we offer a comprehensive range to support your growth, wellbeing, and everyday life. You can design the package to suit you and your lifestyle.

Your core benefits include:

• Competitive salary
• 10% on target annual bonus
• Access to an online private GP 24/7 for you and your immediate family
• Market‑leading paid carers leave with up to 2 weeks off
• Equalised maternity, paternity, and adoption leave – 18 weeks’ full pay and 8 weeks’ half pay
• Discounted EE and BT products, including mobile and broadband
• Market leading Pension scheme – 5% from you and 10% from us
• Holiday purchase scheme

You can select additional benefits, including healthcare, dental, gym memberships and more when you’re ready.

Ready to connect for good and help shape the future?

Join us at a pivotal moment for BT Business.

We are executing a multi‑year transformation to restore growth, modernise at scale and unlock new markets beyond connectivity. Our ambition is clear – return to sustainable revenue and EBITDA growth, strengthen our market position, and deliver meaningful shareholder value through disciplined execution and bold reinvention.

We are fundamentally reshaping the business – simplifying our portfolio, digitising our customer experience and building market‑leading capability across cyber, AI and managed services, all powered by the UK’s leading fixed and mobile networks. This is a shift from a legacy connectivity provider to a modern, solutions‑led, AI‑first business that can truly differentiate in a competitive and fast‑moving market.

With execution momentum building and a clear path to growth, the opportunity now is to scale what works, accelerate performance and fully realise our potential. This is about delivering against ambitious financial outcomes while transforming how we operate – creating a business that is simpler, faster, more innovative and easier to do business with.

If you want to be part of the team shaping the turnaround of a multi‑billion‑pound business – and building a stronger, more competitive BT for the future – this is your moment.