Lead Data Scientist (Defence) - Onsite UK Clients
Harnham is looking for a Lead Data Scientist (Defence) - Onsite UK Clients
Job description
Are you ready to apply data science where it matters most?
Do you want your models to drive real-world outcomes in mission-critical settings?
Do you enjoy working onsite with a variety of invested clients?
A leading UK consultancy is building a dedicated AI & Data Science team to strengthen its delivery capability in Defence. They’re known for outcome-driven transformation work and operate a genuinely hands-on model where technical teams embed with client stakeholders to make change stick. The business has a strong track record across complex, high-stakes environments, and is now scaling its DS capability to deliver ML, GenAI and simulation solutions end-to-end. For high performers, there’s clear progression and the chance to shape the direction of a growing AI practice.
You’ll work directly with end users and senior stakeholders to shape solutions from concept through to embedded impact. This is a high-trust, high-autonomy role where you’ll own both technical delivery and stakeholder engagement - all within a deeply collaborative consulting environment.
They're hiring at Lead (3-5 years of experience) to Principal level (5-10+ years of experience).
Key Responsibilities
- Build and deploy machine learning models and simulation tooling in secure environments
- Lead technical delivery across multi-disciplinary teams, including consultants and engineers
- Work closely with client stakeholders on-site to co-design and iterate on solutions
- Translate complex analytics into strategic business outcomes with measurable value
Key Details
• Salary: £80,000 - £150,000
• Working model: On-site 4–5 days/week across UK client locations in England & Scotland (travel required)
• Tech Stack: Python, MLflow, Databricks, Docker, Azure OpenAI, simulation frameworks
• Clearance: British citizenship / Security Clearance eligibility required
• Visa: This role cannot sponsor
Interested? Please apply below.
Extra information
- Status
- Open
- Education Level
- Secondary School
- Location
- London Area
- Type of Contract
- Full-time jobs
- Published at
- 25-01-2026
- Profession type
- ICT
- Full UK/EU driving license preferred
- No
- Car Preferred
- No
- Must be eligible to work in the EU
- No
- Cover Letter Required
- No
- Languages
- English
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