Job Req ID: 43702
Posting Date: 11/03/2025
Function: ESN Network Engineering
Location: Bristol or Borehamwood
Why this job matters
The Emergency Services Network (ESN) is a huge strategic priority for BT and our commitment to do the best for our customer and our country. ESN will be one of the most advanced Emergency Services Networks in the world. and BT is proud to the official supplier providing mission critical and trusted communications for Britain’s Emergency Services. The ESN will replace the existing Airwave network and building upon on EE’s existing 4G network and to provide essential new voice, data services, and critical communications services to 300,000 members of frontline emergency service users.
The purpose of Mobile Test & Innovations Labs is to design, integrate/build, test, and deliver market-leading converged Mobile and Fixed network services. The success of the function is based upon delivering stable, best in class, converged services using the latest technologies – transforming our network with 5G and Network Function Virtualisation. We are innovators who make future services happen. The Voice Core team support and manage the build, integration, test and operation of multiple Lab environments for developing and testing new services for our customers.
The successful candidate will be cleared to BPSS (or equivalent) as a minimum. You may even be required to undergo National Security Vetting (e.g. CTC, SC or NPPV).
What you’ll be doing
• Develop, build and maintain multiple core network Test Environments
• Work co-operatively with other business communities and 3rd parties to improve service performance, quality, and customer experience. Engage with project teams to drive the design, build, test and delivery of new fixed and mobile services or improvements to existing services
• Drive effective incident, change, problem, risk, and vulnerability management
• Drive and maintain alignment of the Test Environments with the live EE network
• Champion and drive continuous improvement for the test, design and operation service that we offer to our key stakeholders
The skills you’ll need
Troubleshooting
Issue Resolution
Vendor Management
Network Configuration
Growth Mindset
What we would like to see on your CV
• Proven background in performing mobile telecoms support or technology networking roles
• Excellent knowledge of IP routing protocols and mobile network protocols, including SS7, radius, diameter and AAA
• Experience of Openstack, Kubernetes, VMWare and other cloud technologies
• Ability to partner with the business to understand and analyse user requirements and inform the architecture design for software, systems and networks.
• Demonstrable subject matter expertise in complex, technical infrastructure, products and services. You develop bespoke solutions to meet short, medium and long-term customer needs.
• Exposure to mobile stack vendors (Oracle, Ericsson, Nokia, Mavenir), OSS tools and systems, Tracing tools (Wireshark, NetScout), Network Function Virtualisation and VMWare stack, would be beneficial
Benefits
At BT, we entertain, educate, and empower millions of people every single day. We’re a brand built on connecting people – whether that’s friends, family, businesses, or communities. Working here, you’ll receive an attractive salary and a range of competitive benefits, but – more than that – you’ll be joining an ambitious organisation with a culture of togetherness, collaboration, and inclusivity, that takes a genuine and proactive interest in your progress and development.
• 10% on target annual bonus
• BT Pension scheme, minimum 5% employee contribution, BT contribution 10%
• X4 Salary Life Assurance
• Huge range of flexible benefits including Cycle to Work, Healthcare, Season Ticket Loan, Electric Vehicle Salary Sacrifice
• 25 days annual leave (not including bank holidays), increasing with service
• From January 2025, equal family leave: receive 18 weeks at full pay, 8 weeks at half pay and 26 weeks at the statutory rate. It’s for all parents, no matter how your family is made up.
• Enhanced women’s health support: including help with menopause symptoms, cancer screenings, period care and more.
• 24/7 private virtual GP appointments for UK colleagues
• 2 weeks paid carer’s leave
• World-class training and development opportunities
• Option to join BT Shares Saving schemes
• Discounted broadband, mobile and TV package
• Access to 100’s of retail discounts including the BT shop
Flexible Working
This role offers a 3 together, 2 wherever working model. This means you are required to be at your contractual location 3 days a week with 2 flexible days per week.
With over 175 years of heritage, BT is now the flagship business brand of BT Group. We’ve brought together our best people and capabilities into a B2B powerhouse serving 1.2 million business customers internationally.
We’re a global 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 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.
A FEW POINTS TO NOTE:
Although these roles are listed as full-time, if you’re a job share partnership, work reduced hours, or any other way of working flexibly, please still get in touch.
We will also offer reasonable adjustments for the selection process if required, so please do not hesitate to inform us.
DON'T MEET EVERY SINGLE REQUIREMENT?
Studies have shown that women and people who are disabled, LGBTQ+, neurodiverse or from ethnic minority backgrounds are less likely to apply for jobs unless they meet every single qualification and criteria. We're committed to building a diverse, inclusive, and authentic workplace where everyone can be their best, so if you're excited about this role but your past experience doesn't align perfectly with every requirement on the Job Description, please apply anyway - you may just be the right candidate for this or other roles in our wider team.