Job description | GTR Careers CareerZone - Data Scientist (3651)
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ReciteMe
Data Scientist (3651)
Competitive Salary
Monument Place
Permanent
4 September 2026
Data Scientist
Location: Hybrid, Monument Place
Reporting to: Insights Lead
Help Shape the Future of Data-Driven Decision Making at GTR
Are you passionate about turning complex data into meaningful insight that drives real-world outcomes?
At GTR, we're looking for an ambitious and forward-thinking Data Scientist to help us unlock the power of data, machine learning and advanced analytics across one of the UK's largest train operating companies.
This is a unique opportunity to play a key role in establishing GTR's first in-house machine learning capability, helping us better understand future risks, opportunities and operational outcomes. You'll work at the heart of our Data & AI function, developing predictive models that support smarter decision making, improve performance and create tangible value for our customers and business.
About the Role
As a Data Scientist in the Central Data & Ai function, you will use advanced analytics, statistical modelling and machine learning techniques to extract forward-looking insights from large and complex datasets across multiple business domains.
Working closely with operational and business stakeholders, you'll help define business problems, test hypotheses and develop predictive and prescriptive models that influence decision making across commercial, operational and safety functions.
This role offers the opportunity to work within a modern enterprise data environment, leveraging over 40 DataHub products that support more than 2,000 active users. As GTR continues to expand its data and AI capabilities, you'll play an important role in shaping standards, approaches and best practices for data science across the organisation.
What You'll Be Doing
What We're Looking For
We're looking for a curious and commercially aware Data Scientist who combines strong technical expertise with excellent stakeholder engagement skills.
You Will Bring:
Qualifications
Why Join Us?
This is an exciting opportunity to help shape the future of data science and AI at GTR.
You'll work on meaningful challenges that directly influence how one of the UK's largest train operating companies serves its customers, manages risk and improves performance. You'll have the chance to build innovative solutions at scale, work with modern technologies and collaborate with colleagues across the business to create lasting impact.
Our culture is built around being Fair, Accountable, Collaborative, Transparent and Open-Minded, while ensuring everyone feels Valued, Respected and Safe. We believe diverse perspectives drive better outcomes and we're committed to creating an inclusive environment where everyone can thrive.
Ready to Make an Impact?
If you're passionate about using data science, analytics and machine learning to solve complex business challenges and shape better outcomes, we'd love to hear from you.
Join us and help build the future of data-driven decision making at GTR.
Please note that we reserve the right to close this vacancy earlier than the advertised closing date if we receive a high volume of suitable applications.
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Benefits
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What our staff say
"I'm a Thameslink passenger host and team leader based at Luton station and I'm currently doing a Level 3 Supervisor apprenticeship so that I can improve my skills even further. I was hesitant to do the apprenticeship at first because of my age - I left school over 60 years ago without any qualifications! It's been hard to get back into the routine of learning again."
Bob Bryce
Passenger Host Team Leader
"It was my brother's suggestion to join the railway. He was already working in the industry and knew I had some university bills to pay off so told me to give it a go, get out of debt and see what I wanted to do next. After a while, it just felt like actually - this is exactly where I'm meant to be. I'm part of a great team and the on-board department as a whole are brilliant to work with. I feel at home here."
Tonderai Matizha-Johnson
Area Operations Manager
"When I saw that GTR was advertising places for its apprenticeship scheme I looked into it straight away because I thought it was a great opportunity to learn whilst getting real life experience in a 9-5 job. I applied for a level three business administration apprenticeship and was thrilled to find out I had a place on the course! I was so excited that I didn't even mind it was based 250 miles away from where I lived."
Harriet Dee
Team Administrator
"Working for GTR is very rewarding and fulfilling. You really feel like you're making a difference to customers, no matter what role you're in as at the end of the day they're the heart of our business. I've had lots of opportunities to explore other aspects of the business including supporting our station staff and gaining my Train Dispatch Licence which has been enriching for my experience here."
Maggie Luckhurst
Platform / Train Dispatch
"If you've always had an interest in rail, or maybe you're just curious to find out what working in the railway might look like, GTR is the operator to go for. Not many companies do an official work experience program and this unique opportunity will give you a good grounding with varied activities to help you find the best place in the railway for you. It certainly did it for me."
Nathaniel Owen
Station Manager
"I work as part of the Fleet Infrastructure team, which means ensuring our 18 Engineering locations operate safely and efficiently. We oversee all building and track maintenance works as well as various minor and major projects across the network."
Hannah Richards
Fleet Infrastructure Administrator
"I started in a small ticket office back in 1996 and have continued to work my way up ever since. A previous manager told me about a job he'd seen advertised for a trainer. 'd never considered a job in HR or mentoring before then, but he said I'd be perfect for it and I haven't looked back since!"
Zoey Hudson
Head of Talent, Diversity and Inclusion
"Since April, I've helped to support our Kickstart Scheme. It's been a really rewarding process to be part of because I know first-hand how tough it can be to find work once you're out of it."
Jack Gow
Mobile Station Manager
"I love the freedom that comes with being a train driver. Obviously, there are rules and regulations to follow as well as duties and commitments to carry out, but in a way, you're sort of your own boss, which is nice."
Ashley John
Train Driver
"I'm a Thameslink passenger host and team leader based at Luton station and I'm currently doing a Level 3 Supervisor apprenticeship so that I can improve my skills even further. I was hesitant to do the apprenticeship at first because of my age - I left school over 60 years ago without any qualifications! It's been hard to get back into the routine of learning again."
Bob Bryce
Passenger Host Team Leader
"It was my brother's suggestion to join the railway. He was already working in the industry and knew I had some university bills to pay off so told me to give it a go, get out of debt and see what I wanted to do next. After a while, it just felt like actually - this is exactly where I'm meant to be. I'm part of a great team and the on-board department as a whole are brilliant to work with. I feel at home here."
Tonderai Matizha-Johnson
Area Operations Manager
"When I saw that GTR was advertising places for its apprenticeship scheme I looked into it straight away because I thought it was a great opportunity to learn whilst getting real life experience in a 9-5 job. I applied for a level three business administration apprenticeship and was thrilled to find out I had a place on the course! I was so excited that I didn't even mind it was based 250 miles away from where I lived."
Harriet Dee
Team Administrator
"Working for GTR is very rewarding and fulfilling. You really feel like you're making a difference to customers, no matter what role you're in as at the end of the day they're the heart of our business. I've had lots of opportunities to explore other aspects of the business including supporting our station staff and gaining my Train Dispatch Licence which has been enriching for my experience here."
Maggie Luckhurst
Platform / Train Dispatch
"If you've always had an interest in rail, or maybe you're just curious to find out what working in the railway might look like, GTR is the operator to go for. Not many companies do an official work experience program and this unique opportunity will give you a good grounding with varied activities to help you find the best place in the railway for you. It certainly did it for me."
Nathaniel Owen
Station Manager
"I work as part of the Fleet Infrastructure team, which means ensuring our 18 Engineering locations operate safely and efficiently. We oversee all building and track maintenance works as well as various minor and major projects across the network."
Hannah Richards
Fleet Infrastructure Administrator
"I started in a small ticket office back in 1996 and have continued to work my way up ever since. A previous manager told me about a job he'd seen advertised for a trainer. 'd never considered a job in HR or mentoring before then, but he said I'd be perfect for it and I haven't looked back since!"
Zoey Hudson
Head of Talent, Diversity and Inclusion
"Since April, I've helped to support our Kickstart Scheme. It's been a really rewarding process to be part of because I know first-hand how tough it can be to find work once you're out of it."
Jack Gow
Mobile Station Manager
"I love the freedom that comes with being a train driver. Obviously, there are rules and regulations to follow as well as duties and commitments to carry out, but in a way, you're sort of your own boss, which is nice."
Ashley John
Train Driver
"I'm a Thameslink passenger host and team leader based at Luton station and I'm currently doing a Level 3 Supervisor apprenticeship so that I can improve my skills even further. I was hesitant to do the apprenticeship at first because of my age - I left school over 60 years ago without any qualifications! It's been hard to get back into the routine of learning again."
Bob Bryce
Passenger Host Team Leader
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GTR stands for Greater Thameslink Railway, and includes Southern, Thameslink, Great Northern and Gatwick Express. GTR and Greater Thameslink Railway are trading names of Thameslink Southern Great Northern Limited (TSGNL)
Copyright Thameslink Southern Great Northern Limited, Registered in England under number: 12545324, Registered office: 1st Floor, Monument Place, 24 Monument Street, London EC3R 8AJ. Thameslink Southern Great Northern Limited is owned by the DfT Operator Limited (DfTO).
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