Customer Solutions Design Specialist (Wales)

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

Benefits offered by this job

10% on target annual bonus

25 days Holiday

Online private GP 24/7 for you and you

Immediate family

Market-leading paid carers leave – 2 w

Job summary

BT Group in Cardiff is seeking a senior Architecture WAN Engineer to design and deliver complex WAN solutions for UK customers. You will lead core network upgrades, create precise designs, and drive standardization and automation while collaborating with vendors and stakeholders.

You will travel across Wales to support deployments and ongoing improvements, with a focus on security, reliability, and future-ready connectivity. A CCNP/JNCIP is desirable.

Qualifications

• Experience with Cisco and Juniper routing platforms.
• Design WAN and enterprise networks including edge, firewall, Wi‑Fi and data centre.
• Ability to create clear low‑level designs and design standards.
• Documentation of designs, templates and statements of work.

Responsibilities

• Lead core network design activities for upgrades and complex WAN solutions.
• Become SME for core network design and operations.
• Create clear designs and documentation for customer edge, core and service-provider networks.
• Support standardization, automation, and deployment.
• Provide technical direction and fourth‑line support for complex issues.

Skills

Cisco & Juniper routing

WAN design

IP networking (BGP/OSPF)

Network documentation

MPLS/DWDM

Edge/Firewall/Wi‑Fi/Data centre

Stakeholder management

Education

CCNP or JNCIP level qualification

Job description

Req ID: 61401Job Function: Architecture Solution and DesignPosting Start Date: 09/08/2026Posting End Date: 31/08/2026Division: UK BusinessJob Location: GBR Cardiff 3 Capital QuarterAdvertised Salary: Competitive + Market Leading BenefitsThis role involves frequent travel across Wales. Please only apply if you can meet the travel requirements of the role. A full UK driving licence is required.About the roleAs part of a major networking programme, you will play a key role in supporting and developing one of the UK's largest shared network infrastructures.In this role, you will help drive the ongoing development and evolution of the core network, designing and delivering complex Wide Area Network (WAN) solutions for customers while evaluating and introducing new technologies and services. Working closely with a range of stakeholders, you will contribute to the delivery of resilient, scalable, and supportable connectivity solutions that meet both current and future requirements.You will support the introduction and enhancement of services such as cloud connectivity, multi-homed internet transit, and higher-speed core network capabilities, helping to ensure the network continues to provide secure, reliable, and future-ready connectivity for the organisations that depend on it. This is an exciting opportunity to work on critical national infrastructure while helping to shape its future performance, resilience, and service offering.What you’ll be doingTake responsibility for design activities across the core network upgrades and complex customer WAN solutions.Become a subject matter expert on the core network design and operation.Create clear, supportable network designs and documentation for customer edge, core and service-provider network solutions.Support standardization, simplification and automation in network design and deployment.Analyze emerging technology trends and work with vendors to understand new hardware and software capabilities.Provide technical direction and guidance to engineering and support teams.Provide fourth-line support for complex operational issues, using evidence and facts to resolve problems from the bottom up.Essential Skills / ExperienceExperience of Cisco and Juniper routing platforms and technologiesExperience designing WAN and enterprise network solutions, including edge, firewall, Wi-Fi and data centre environments. Working with customers to understand requirements.Experience creating technical documentation, including low-level designs, design standards, templates and statements of work.Desirable Skills / ExperienceCCNP or JNCIP level qualification, or equivalent practical experience.Experience with MPLS, fibre optic transmission, DWDM and structured hardware or software testing in a lab environment.Excellent knowledge of IP network technologies, including practical experience with BGP and OSPF.Strong Stakeholder ManagementOur PackageTailored 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 schemeYou can select additional benefits, including healthcare, dental, gym memberships and more when you’re ready.Ready to connect for good and help shape the future? Apply now.With over 180 years of heritage, BT Business has brought together our best people and capabilities into a B2B powerhouse serving 1.2 million business customers in the UKWe’re a leader for secure connectivity and collaboration platforms for businesses of all shapes and sizes, from big household names and government departments, right through to sole traders and new start-ups. But it’s not just the technology that matters, it’s what it can do to help them build stronger, smarter, more secure businesses.We are Customer-First Challengers, who are Committed, Clear and Connected. We value diversity and inclusion and believe in making a positive impact. We connect for good by championing digital inclusion and equipping people, businesses, and communities with digital skills to thrive.As a member of our team, you will be part of an organisation that celebrates difference, fosters innovation and provides you with opportunities to be your best. With millions of businesses relying on us daily, joining BT means you can be part of a diverse and multi-skilled team that makes a significant impact to society.