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Recruiter: Lloyd Hughes
Career Grade: E
Closing Date: 2nd September 2026
Due to the sensitive nature of this role, you will be required to undergo DV (Developed Vetting) level Security Clearance (https://www.gov.uk/government/publications/united-kingdom-security-vetting-clearance-levels/national-security-vetting-clearance-levels). An allowance of £5k per annum may be payable monthly while you hold this DV and continue to work in a role that requires that level of security clearance. The terms of this allowance will be made available if you are successful in being recruited into this role.
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.
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.
About the role
As a Data Scientist, you'll help unlock the value hidden within some of the UK's most diverse and complex datasets.
Working alongside experienced technical specialists, you'll apply data science, advanced analytics, machine learning and emerging AI techniques to solve real-world challenges that have genuine operational and societal impact.
You'll work across a broad range of customer and business problems, helping transform data into actionable insight, supporting evidence-based decision making and contributing to innovative solutions that create measurable value.
No two assignments are likely to be the same. You could find yourself evaluating emerging AI technologies, developing classification models, exploring opportunities for automation, building analytical solutions or helping stakeholders understand complex information through clear and meaningful insight.
This role requires DV Clearance and will be onsite 5 days a week in either London, Manchester, Ipswich or Cheltenham.
What you’ll be doing
• Apply Data Science, Machine Learning and AI techniques to transform complex data into actionable insight and measurable outcomes.
• Work with stakeholders and subject matter experts to understand complex cyber and network problems, define clear problem statements and identify where data science can add value.
• Identify, acquire, understand and combine relevant datasets from cloud, network and security environments.
• Analyse large-scale telecoms, DNS, network and cyber datasets to uncover patterns, risks, anomalies and opportunities for improved threat detection.
• Develop data science capabilities such as machine learning models, anomaly detection, graph analytics, big data processing pipelines, visualisations and reporting.
• Use tools such as Python, SQL and distributed data processing technologies to build scalable analysis and reusable capability.
• Translate complex analysis into clear insight, recommendations, reports and presentations for technical and non-technical stakeholders.
• Collaborate with data scientists, engineers, cyber specialists and product teams to take ideas from exploration through to practical delivery.
• Contribute to agile team activities, knowledge sharing, peer review and continuous improvement of our data science practice.
Essential Skills / Experience
• Experience using Python, R or similar tools for analysis, modelling, visualisation or automation.
• An understanding of core data science techniques such as exploratory data analysis, statistical reasoning, machine learning, summarisation and visualisation.
• The ability to work with complex or messy datasets and turn them into useful insight.
Desirable Skills / Experience
• Experience working with large-scale data using tools such as Apache Spark, cloud platforms or distributed processing environments.
• Exposure to cyber security, malware, DNS, networking, telecoms data or threat intelligence.
• Experience developing models or analysis beyond notebooks into reusable pipelines, services or production-ready capability.
Our Package
When you join our team, you'll play a role in delivering work that makes a real difference across the UK. In return, you'll be rewarded with a market-leading Total Reward package that reflects the value of your skills and expertise. From structured technical progression and industry-recognised training to generous family support and flexible benefits, we're committed to helping our people succeed at every stage of their career journey.
• A structured Technical Progression Pathway to recognise and reward appropriate technical people.
• Competitive DV market aligned salaries
• Tiered role based DV allowance of up to £5k per annum paid monthly
• World-class training and development opportunities
• 10% on target bonus
• 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.
• BT Pension scheme, minimum 5% Employee contribution, BT contribution 10%
• New BT Better Workplace working environments at strategic locations across the UK
• Huge range of flexible benefits including an EV salary sacrifice, cycle to work, healthcare, season ticket loan, additional annual leave
• On-call allowance (Depending on role requirements)
• Access to 100’s of retail discounts including the BT shop
• 24/7 private virtual GP appointments for UK colleagues
• Option to join BT Shares Saving schemes
• 25 days annual leave (not including bank holidays), increasing with service
• 2 weeks paid carer’s leave
• Discounted broadband, mobile and TV packages
• Enhanced life assurance of up to ten times base salary
Security is one of the fastest growing parts of our global organisation. We are protecting our networks from more than 6,500 cyber attacks each day, investing over £40m in research each year - and in employing nearly 3,000 people, we’re also the largest private cyber employer in the UK. With incredible opportunities to learn, develop and grow your skills, we’ll invest in you, nurture your potential and shape your future – whatever your background or experience.
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.
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.
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