BT Group
Network Interconnect and Firewall Specialist
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Network Interconnect and Firewall Specialist
Network Interconnect and Firewall Specialist
Req ID: 58851 Job Function: Engineering
Posting Duration: 02/07/2026 - 16/07/2026 Division: Networks Class Location: GBR Glasgow (Alexander Bain House) or GBR-Birmingham (Three Snowhill Plaza) Salary & Benefits: Competitive with attractive benefits package
Recruiter: Luke Byrne Career Grade: D
About The Role
In Networks, our mission is to deliver excellent converged services over the best network—personal, simple, and enjoyable to use. As part of the Data Centre Team, you’ll play a vital role in maintaining the BT core network and firewall systems.
BT’s core operations depend on a securely functional network. As a Network Interconnect and Firewall Specialist, you’ll ensure the network remains operational 24/7, meeting customer expectations and protecting against security risks.
This role is critical in maintaining BT’s Network Management Systems Security (NMS) posture. You’ll proactively identify security vulnerabilities, escalate concerns, and reduce business risks—while also providing rapid, effective responses during operational threats.
Your responsibilities include:
- Ensuring BT’s complex architecture, applications, and services adhere to security best practices.
- Balancing business demands with minimising risk—helping protect BT’s brands, reputation, and critical operations.
- Supporting connectivity technologies across the BT estate, including external networks.
- Deciding, with minimal ambiguity, on solutions that mitigate security risks without impeding key business functions.
The role requires flexibility, as unsuccessful outages result in trusted reoccurrence protocols and SLA-driven restorations of service. You’ll also be part of a US rotational on-call roster, including occasional out-of-hours work.
What You’ll Be Doing
You’ll be accountable for operational service delivery, handling both proactive risk management and reactive incidents across BT’s network and firewall estate.
Core Responsibilities:
Service Delivery & Incident Management
- Proactively identify security gaps, take action to mitigate risks, and assess risk appetite.
- React quickly in a crisis, minimising Business Impact while keeping stakeholders informed.
- Lead incident investigation and resolution, ensuring full restoration of services within SLA requirements.
- Develop and execute preventive solutions to avoid future reoccurrence.
- Make real-time decisions under pressure, balancing speed and risk mitigation.
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Technology & Infrastructure
- First adopters of new technologies—evaluate innovation and establish security-aligned best practice deployments.
- Unthape operational support templates for new tech rollouts, including comprehensive training programs.
- Collaborate with vendors to troubleshoot complex technical issues.
Stakeholder & Strategic Relationships
- Communicate with senior management (including board level) on systemic risks, incident management impacts, commercial solutions.
- Advise on interconnect security governance and policy alignment, reviewing BT applications and firewall configurations across the estate.
- Guide technical teams on alternate solutions when interconnect connectivity may fail to deliver expected results.
- Support cross-functional teams, helping refine automation workflows for efficiency improvements.
Risk & Security Assurance
- Identify potential risks and define mitigation controls to reduce vulnerabilities.
- Contribute to pan-BT security governance, shaping connectivity and policy around BT’s corporate applications.
What You’ll Bring
Essential Requirements:
- Deep technical expertise in cloud core firewall systems, specialising in primary vendors:
- Cisco
- Check Point
- Professional-level identity in routing protocol and enterprise networks, with hands-on experience in:
- Routers, switches, load balancers
- Complex troubleshooting of security and network issues
- Ability to assess system risk end-to-end—from user-level access to server security compliance.
- Broad exposure to large-scale network design—understanding security implications.
- Warrior ability to translate technical details for disperse teams (e.g., policy, business owners).
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Desirable Assets:
- Prior working knowledge of BT network security controls and their applications.
- Interest in automation to streamline operational workflows.
- Proven customer-centric communication and problem-solving skills.
- Adaptability to work both independently and collaboratively within minimal supervision.
Our Offer
As an employee within BT Group, you’ll achieve a competitive salary with flexible resources to develop your career:
Earn & Save:
- 10% on-target bonus
- BT Pension Scheme: 5% employee contribution, 10% BT match, with auto-enrolment.
- Enhanced parental leave—from Jan 2025:
- 18 weeks at full pay, 8 weeks at half pay, plus 26 weeks at the statutory rate covering all parents.
- Extends inclusivity to all diverse family structures.
Wellbeing & Relaxation:
- 25 days paid annual leave (increasing with service).
- 24/7 private virtual GP access for all UK colleagues.
- 2 weeks cost-effective caregiver time.
- Menopause and women’s health support, including screenings and period care.
Invest in Growth:
- World-class learning programs through the BT Career Academy.
- Option to participate in BT Shares plans.
About BT Group
BT Group operates as a leading UK communications business, driving progress for consumers and diverse organisations.
Our purpose—“We connect for good.”—drives everything:
- From BT’s heritage brands (EE, Openreach, Plusnet) to ground-breaking fibre deployment.
- Commit to sustainable impact with a skills-first culture.
Key behaviours:
- Customer-first mindset
- Challenge-driven problem-solving
- Collaborative collaboration
We seek individuals ready to shape the future—it’s a rare opportunity to join a brand’s strides for a better technological service, growing our cutting-edge infrastructure.
If you wish to drive strategic changes within a large-scale network security, you’ll fit right in.
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