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BT VOIP Network Engineer in Cheltenham, United Kingdom

Security isn't always the first thing that comes to mind when you think of BT, but when it comes to keeping everyone safely connected, We Are The Protectors. We deal with thousands of cyber-attacks every day, so that millions of people can safely go about their daily lives and run their businesses. We deliver vital work at scale, with real breadth and impact. We connect for good.

About this role

You'll be joining a specialist security team that is a trusted partner to governments worldwide, protecting critical national infrastructure and committed to the safety and security of our nation and global communities. Our mission focused work is innovative, inspiring and technologically challenging in a way that makes every day different and stimulating. We provide the opportunity to work on rare projects, with exciting tools and brilliant people. Everyone has access to unparalleled professional and personal development opportunities and your contribution is always valued.

As a VOIP Network Engineer you’ll be working within a fast paced, constantly evolving team, that deliver world class secure solutions that make a real difference to our customers. You’ll be leading the design and delivery of new VOIP solutions, working directly with our customers to understand their requirements to do so. In delivery you’ll then be setting project technical direction and be deeply hands on in implementation.

You'll have the following responsibilities

  • Leading the development of VOIP solutions, by understanding the core BT VOIP/SIP platforms and how they can be used or consumed to provide for our customer’s needs.

  • Working directly with our customers to understand their requirements.

  • Providing the technical direction for the build and delivery of world class and secure VOIP solutions.

  • Be hands on in the build and development of VOIP solutions and services.

  • Working with support teams to enable management and ongoing support of deployed VOIP solutions.

  • Ensuring compliance of developed systems with security policies and regulatory requirements

  • Acting as a VOIP subject matter expert within wider team, providing advice and support to wide projects as required.

You'll have the following skills & experience


  • Broad understanding and experience of deploying VOIP and SIP based networks, including a good knowledge of how they work and the internal signalling and interfacing.

  • Experience of using and deploying SBCs to interface to provider networks.

  • Working with customers to understand requirements and design on solutions/platforms to meet these requirements.

  • It would be helpful but not essential to have some experience of legacy TDM networks and transitioning customers/service to VOIP.

  • Communicating complex technical concepts and solutions to a range of technical and non-technical audiences

  • A desire to continually update, enhance and validate own skills.


  • Certification in VOIP or network engineer disciplines, technologies, or suppliers such as Cisco is desirable, but practical experience is more important.

  • Experience in internal and external stakeholder management and engagement


  • Free BT Broadband

  • Discounted TV & mobile packages and BT products

  • On target Bonus

  • Share options and 10% pension contribution

  • Professional development and paid for industry certifications/qualifications

  • Flexible benefits/rewards including dental insurance, healthcare, gym memberships etc.

  • Well-being support for you and your family

  • 3 days paid volunteering a year

  • Flexible and smart working (subject to business needs)

Security isn’t always the first thing that people think of with BT, but it is one of the fastest growing parts of our global organisation. We protect our networks from more than 6,500 cyber-attacks each day, invest over £40m in research each year and employ more than 3,000 people - which makes us the largest private cyber security employer in the UK. With incredible opportunities to learn, develop and grow your skills, we’ll invest in you, nurture potential and shape your future – whatever your background or experience. You can find out more about Security in BT here (

In today’s world, safe and secure digital connections have never been more vital. You’ll be joining a global company operating at the forefront of the information age: BT employs 90,000 people in 180 countries. With huge scale, we’re capable of achieving great things, striving to be personal, simple, and brilliant for our customers whilst creating an inclusive working environment where people from all backgrounds can succeed. Play your part. Make a difference. We are the Protectors.

How to Apply

It's easy to apply online; you just need a copy of your up-to-date CV and to follow the step-by step process. Don't worry if you need to make changes - you'll have the opportunity to review and edit your work on the final page. We look forward to receiving your application!

Job: Cyber security

Title: VOIP Network Engineer

Location: GBR %26 Ireland-GBR-Gloucestershire-Cheltenham

Requisition ID: 156576

Other Locations: UK %26 Ireland-United Kingdom-London-London, UK %26 Ireland-United Kingdom-Suffolk-Ipswich