Network Security Design Specialist

BT Group; Chippenham; On-site; GBP 70,000 - 110,000; Full time

Benefits offered by this job

Bonus 10%

25 days holiday

Private GP 24/7 for you and family

Pension scheme

Parental leave

BT product discounts

Holiday purchase scheme

Job summary

BT Group is seeking a Customer Solutions Design Specialist within Defence & Defence Industry Partners to design and deliver secure end-to-end network solutions for critical programmes. You will lead technical direction, build trusted customer relationships, and work with Cisco, Juniper, Palo Alto, and HPE Aruba among others.

You will produce high/low-level designs, mentor teams, and drive governance and resource planning to ensure successful delivery in secure environments.

Qualifications

• Ability to produce high- and low-level designs translating business needs into secure, resilient architectures.
• Knowledge of enterprise security technologies and standards (NCSC, NIST) and experience with firewalls, VPNs, IDS/IPS.
• Strong stakeholder management and leadership of technical teams.

Responsibilities

• Produce high/low-level designs from concept to delivery for multi-vendor environments.
• Collaborate with customers to translate business needs into practical, secure solutions.
• Provide technical leadership and mentorship to TDAs and design teams.
• Lead design governance, peer reviews, and resource planning.

Skills

Design expertise

Security architectures

Stakeholder management

Job description

About the role

Join BT's Defence & Defence Industry Partners team as a Customer Solutions Design Specialist, where your work will help design and deliver secure solutions that support critical Defence programmes and contribute to keeping the UK safe and secure.

Working within an existing team that delivers complex, bespoke and secure end to end network solutions and working with vendors such as Cisco, Juniper, Palo Alto and HPE Aruba amongst others.

This is a customer facing and customer focussed role, and you must be able to lead the technical direction of projects and build a strong, trusted relationship with them and senior stakeholders.

You'll work closely with other teams such as our Solution Architects, Operations and Security teams and be a Subject matter expert enabling the successful delivery of complex, bespoke solutions.

What you'll be doing

• Produce High quality, complex, multi vendor High level and Low level Design from concept to delivery
• Collaborating with our customer to turn their business needs into practical solutions.
• Technically Leading complex, bespoke projects
• Building strong relationships with customer and stakeholders
• Creation of statements of work, bills of materials
• As a subject matter expert sharing your Knowledge by coaching and mentoring colleagues and operational support teams
• Provide day-to-day technical leadership to TDAs and design teams
• Drive design assurance through peer reviews and technical governance checkpoints
• Plan and cost resource requirements against deliverables

Essential Skills / Experience

• Production of high- and low-level solution designs, translating business requirements into secure and resilient architectures that align with enterprise design principles, security reference architectures, and industry standards such as NCSC and NIST
• Knowledge of enterprise security technologies, including firewalls, IDS/IPS, DNS security, VPNs, secure web gateways, zero trust architectures, load balancing, and application security solutions from leading vendors. e.g. Palo Alto NGFW, F5, etc.
• Strong stakeholder management skills

Desirable Skills / Experience

• Experience developing cloud-native and hybrid solution architectures
• Experience with cloud-native architectures and container platforms
• Experience working in defence or secure environments

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:

• 10% on target annual bonus
• 25 days Holiday
• 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
• Equalized 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.

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.