Network Security Specialist

Job description

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.