Network Security Professional

BT plc; Sheffield; On-site; GBP 60,000 - 90,000; Full time

Benefits offered by this job

Competitive bonus

Flexible working

Training and development

Share options

Pension scheme

BT & EE discounts

25 days annual leave

Volunteer days

37.5 hours per week

Permanent contract

Job summary

BT plc in Sheffield is seeking a Network Security Professional to provide expert technical support on complex cyber security deployments for UK contracts.

You will liaise with customers and vendors, direct support staff, and ensure incident response and remediation align with business needs. The role emphasizes collaboration, communication, and timely delivery.

Qualifications

• Minimum of CompTIA Network+ or equivalent certification.
• Experience delivering network security and cyber security deployments for commercial contracts.
• Ability to provide security advice and remediation to Lines of Business.

Responsibilities

• Provide professional technical support on complex network security deployments.
• Build effective relationships with customers and vendors, managing expectations and deadlines.
• Direct other support staff where appropriate and coordinate incident response.
• Complete integration testing on new products and services with comprehensive documentation.
• Support team leaders and line managers as needed.

Skills

Cyber security

Incident response

Networking fundamentals

Vulnerability assessment

Tools

Fortinet

Cisco ASA

Cisco ISE

Cisco FirePower

Palo Alto

Checkpoint

ZScaler

F5 Load Balancer

Job description

Job Description

Job Title: Network Security Professional

Req ID: 62427

Job Function: Cyber Security

Posting Start Date: 05/11/2026

Posting End Date: 17/11/2026

Division: UK Business

Job Location: GBR Sheffield Endeavour

Advertised Salary: Competitive + Benefits

Salary: Competitive + Benefits

Locations: Sheffield, Belfast, Manchester

About the role

This role exists to provide Professional technical support on complex network security and cyber security deployments for any and all of our UK 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

• 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.
• We need you to be a cyber/ networking security incident decision maker, responsible for ensuring that mitigation controls and incident response are appropriate
• Providing security advice and remediation to Lines of Business within BT and external customers,
• Complete and own integration testing on new products and services, producing all relevant supporting documentation
• Postiviely support team leader and line manager.

Essential Skills / Experience

Minimum of CompTIA Network +/ Equal Certification plus the below Firewall Engineering Skillset:

• o Fortinet
• o Cisco ASA, ISE & FirePower
• o Palo Alto
• o Checkpoint
• o ZScaler
• o F5 Load balancer
• Knowledge and understanding of TCP/IP & OSI seven-layer model and how data networks are structured and operate.
• Knowledge of the best engineering practices and continuous delivery

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 E
• 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.