Network Engineering Specialist

Job Description

Recruiter: Luke Byrne

Career Grade: D

Internal Closing Date: 2nd June 2026

About the role

Our internal Networks unit is responsible for designing, building and running the networks and technology platforms that BT, and our customers, rely on.

Across our fibre, mobile, WiFi and core networks, BT is a connectivity powerhouse, leading the world in the adoption of converged, automated, programmable network technologies. Bringing together network strategy, transformation, and the modernisation of our mobile and fixed network assets - along with direct partnering with Enterprise, Global and Consumer on leading edge, converged services and experiences – our Networks division designs, builds and runs the technology platforms that BT, and our customers, rely upon every day.

In Networks, we play our part, every day, to make this true. We are responsible for the heart of BT, making sure our networks stay reliable, resilient, secure, and ahead of changing demands.

Our networks – both fixed and mobile – play an essential role in our 30 million customers’ lives, their businesses, and the economies of the 180 countries we operate in. We’ve built a team of the world’s best communications technology experts. Our engineers have achieved extraordinary things: constantly upgrading and reimagining the network to stay ahead of the game, innovating using the latest network cloud, AI, virtualisation and advanced optical tech to build and maintain our world class global infrastructure.

• Every year, we file more than 100 new inventions to keep BT, our customers and the UK at the cutting edge.
• Thanks to our investments, we were able to satisfy peak demand in our core network of 22.7 Tb/s in 2020, a 30% increase over the same period in 2019.
• In the past year, average download speeds on our broadband network increased by more than 15% despite this huge increase in demand for bandwidth.
• In the UK, 96 % of people can now receive superfast broadband at more than 30Mbps.
• On mobile we’ve seen a 36% increase in data usage over the last 12 months, with highest recorded peak on 18th March – a throughput peak of 802Gb/s for Europa League football.

Every day, we work to give BT customers the fastest, best connected networks there are, supporting truly world class solutions and services. Put simply, we make the network... work

The Gemini Environment Specialist is responsible for the end‑to‑end management and evolution of the power, cooling and environmental estate that underpins Gemini Evolution’s test facilities. The role provides technical leadership across environment management, operational resilience and engineering best practice, ensuring environments are safe, energy‑efficient and capable of supporting future innovation.

With a strong understanding of BT’s environmental standards and obligations, the Environment Specialist ensures Gemini’s non‑live environments are reliable, sustainable and cost‑effective. By embedding best practice in power and cooling performance, driving continuous improvement and supporting estate rationalisation, the role strengthens the engineering foundations that enable a more efficient and sustainable Gemini environmental estate.

What you’ll be doing

• Act as the technical authority for all power, cooling & environmental infrastructure within Gem Evo control, providing expert direction on design, operational capability and in-life best practice
• Works with the Environment Architect to provide support and input into Gemini’s Environment and Model Strategy ensuring all power and cooling opportunities are understood and shared.
• Own the co-ordination of power distribution, resilience and energy‑efficiency across model environments, ensuring solutions support long‑term platform and service‑team needs.
• Act as the escalation lead for environmental incidents, directing fault isolation, recovery activity, root‑cause analysis, and engineering remediation plans.
• Provides environment consultancy for teams looking to transition models/labs into Gemini as part of the Adastral Park Lab consolidation
• Ensure Gem Evo complies with electrical safety, cooling standards, environmental regulations, and industry Health & Safety frameworks
• Champion environmental sustainability across Gemini, identifying opportunities to reduce power consumption, optimise cooling efficiency, lower carbon impact, and support BT sustainability goals.
• Provide technical leadership into cross‑domain programs (network evolution, automation, facility upgrades), ensuring power, cooling and sustainability considerations shape strategic decisions.
• Develop and maintain Environment contingency plans, covering power/cooling failures, overheating events, load spikes, and disaster‑response scenarios to ensure GemEvo supported services are maintained
• Lead analysis of electrical load trends, energy usage, cooling efficiency, airflow analytics, and environmental metrics—translating findings into clear engineering recommendations.
• Act as a technical mentor to the wider team helping to improve the teams’ environmental abilities by acting as a Technical Champion.
• Works closely with the Environment Manager to ensure Gemini standards are defined and upheld.
• Champions, continuously develops and shares with the team knowledge on emerging trends and changes within the Power & Cooling estate ensuring future Environmental opportunities are reflected within Gemini
• Provide Environment build and maintenance support when required ensuring all Environment GRT’s are managed and completed within SLA

Essential Skills / Experience

• Deep expertise in Network power, environment, and cooling solutions, with hands‑on experience operating in complex technical environments.
• Strong Health & Safety awareness, including the ability to conduct on‑site risk assessments, identify hazards, and ensure safe working practices throughout all environment‑related activities.
• Excellent communication skills, both written and verbal, with the ability to engage effectively with internal teams, external partners, and senior stakeholders.
• Stakeholder management and relationship‑building capability, fostering positive working relationships across peers, leadership teams, and the wider organisation.
• Influencing and conflict‑resolution skills, with the confidence to challenge constructively and drive the right outcomes.
• Commercial awareness, understanding the financial and operational implications of engineering decisions.
• Coaching and development mindset, supporting colleagues, apprentices, and the wider community to build stronger capabilities.
• Commitment to compliance, supports the Environment Manager to ensure the team remain fully Health & Safety compliant across all Environment aspects.
• Agile and collaborative mindset – Able to identify improvement opportunities, apply continuous‑improvement practices, and contribute to projects as a subject matter expert or content owner.
• Specialist technical consultancy – Capable of providing expert advice, recommendations and guidance within defined technical domains.
• Technical influence – Demonstrated ability to guide and influence technical teams to enhance capability, uplift standards and improve delivery effectiveness.

Desirable Skills / Experience

• BT‑standard AC & DC power understanding, with the ability to plan, schedule and oversee power installations to a high technical standard. (Desirable but not essential)

Our Package

• 10% on target bonus
• BT Pension scheme, minimum 5% Employee contribution, BT contribution 10%
• 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.
• 25 days annual leave (not including bank holidays), increasing with service
• 24/7 private virtual GP appointments for UK colleagues
• 2 weeks carer’s leave
• World-class training and development opportunities
• Option to join BT Shares Saving schemes

BT Group is the UK’s leading communications group and the holding company behind some of the country’s most recognised brands – including BT, EE, Openreach and Plusnet. Our purpose is as simple as it is ambitious: we connect for good. Our customers include consumers, small, medium and large businesses, public sector organisations and other communications providers.

BT Group’s role is about setting direction, unlocking value and creating the conditions for our brands and businesses to thrive.

Having come through the most capital-intensive phase of our fibre investment, our focus now is on what comes next – simplifying how we operate, using technology and AI to work smarter, and organising ourselves to serve customers better and grow sustainably. Group teams shape strategy, policy, brand, capital allocation and transformation, helping the whole organisation perform at its best.

We have a singular culture that unites all our people: we are customer-first challengers, who are committed, clear and connected. These behaviours unite us as one team to deliver for our colleagues, our customers, our stakeholders and the country. Joining BT Group means working at the heart of a business that matters to the UK, with the opportunity to shape decisions, influence outcomes and help set the future course of one of the country’s most important companies.