Network Security Specialist

BT Group; Manchester, Sheffield, Greater London; On-site; GBP 70,000 - 90,000; Full time

Benefits offered by this job

Flexible and smart working

Training and development opportunities

Competitive pension scheme

Discounts on BT & EE products

25 days annual leave

Job summary

BT Group is hiring a Network Security Specialist for UK-based sites in Manchester, Sheffield, and London. The role focuses on specialist technical support for complex network and cyber security deployments across BT’s UK contracts. Strong communication with customers and vendors is essential.

The role requires leadership in Agile/ITIL processes, mentoring peers, and producing documentation and configurations for customer projects. Join BT during a pivotal transformation for BT Business.

Qualifications

• External security certifications required or highly desirable.
• Experience with complex network security deployments.
• Ability to lead in Agile/ITIL environments.

Responsibilities

• Provide specialist technical support on complex network security deployments.
• Lead security team discussions and mentor peers.
• Develop policies and configuration builds for customer projects.
• Complete integration testing and document results.

Skills

Security Certifications

Fortinet NSE 7

Cisco CCNP/ASA/FirePower

Palo Alto PCNSE

Zscaler

CheckPoint

NetScaler

Python

Linux/Unix

Windows OS

Job description

Job Description

Job Title: Network Security Specialist

Req ID: 63061

Job Function: Cyber Security

Posting Start Date: 19/10/2026

Posting End Date: 29/10/2026

Division: UK Business

Job Location: GBR Manchester - Dial House, GBR Sheffield Endeavour, GBR-London-BTHQ One Braham

Advertised Salary: Competitive + Benefits

Job Req ID: 63061

Posting Date: 19th October 2026

Function: Cyber Security

Location: Sheffield / Manchester / London

Salary: Competitive + Benefits

About the role

This role exists to provide specialist technical support on complex network security and cyber security deployments for any and all of our UK secure contracts. Building intermate 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.

What you’ll be doing

• We're growing! We currently have vacancies in various teams, so if you have an ambition to be in Cyber Security, we want to hear from you.
• One key thing that all of our engineers have in common is a desire to develop/deliver brilliant, industry redefining platforms as well as their own skills.
• Provide leadership on Agile / ITIL processes and be a decision maker within the security team; Advising those who will be working directly with yourself on best practices and able to support from a 3rd Line Lead perspective.
• Develop peers and colleagues within the team through mentoring and leadership providing trustworthy honest feedback.
• Produce and support polices, functions and configuration builds to allow implementation of customer projects.
• Complete and own integration testing on new products and services, producing all relevant supporting documentation.

Essential Skills

• External Professional Certification in Security Related discipline e.g. Fortinet NSE 7, Cisco CCNP, Checkpoint CCSE or Palo Alto PCNSE; covering some of the following key technologies
• Fortinet
• Cisco ASA & FirePower
• Cisco ISE
• F5
• Palo Alto
• Zscaler
• CheckPoint
• NetScaler
• Python Go Bash
• Native Cloud Security
• Linux/Unix OS
• Windows OS

Rapid prototyping and testing potential solutions, and understanding how to run lean and iterate continuously.

Design user journeys, service maps, documentation, user flows and wireframes.

Collaborate with Product and Engineering colleagues. Facilitate workshops and design sprints.

Skilled in building strong relationships across multiple teams.

Essential Experience

• Experience in Security Operations from a 3rd Line perspective
• Ability to support their team with day to day operations, ensuring customer satisfaction
• An intimiate knowledge of Networks and Network Security
• A drive for leadership and a passion for improvement

Our Package

• Competitive salary and on-target bonus plan
• Flexible and smart working
• Training and development opportunities
• Competitive share options and pension scheme
• Access to discounts on BT & EE products
• 25 days annual leave (not including bank holidays)
• 3 days paid volunteering a year
• Weekly Hours: 37.5
• Salary: Level D
• Position Type: Full-time
• Contract: Permanent

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.