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# Lead / Principal Consultant (AI & Data Science)

- **Company:** Harnham
- **Location:** London, UK
- **Experience:** Expert
- **Contract:** Permanent contract
- **Skills:** Application Programming Interfaces (APIs), Artificial Intelligence, Cloud Computing, Python (Programming Language), Machine Learning, Large Language Models, Build Management, Databricks
- **Published:** May 15, 2026
- **Apply:** https://find.jobs/jobs-near-me/lead-principal-consultant-ai-amp-data-science-london/2770465312-2/

## About the Role

* Strong data science / machine learning background
 * Experience delivering AI / GenAI solutions (LLMs, NLP, etc.)
 * Proven ability to take solutions from concept through to real-world deployment
 * Experience leading projects, workstreams, or teams
 * Strong stakeholder engagement skills - client-facing and commercially focused
 * Evidence of measurable impact (revenue uplift, cost savings, efficiency gains, etc.)

Nice to have

 * Consulting experience (highly preferred)
 * Experience across regulated or complex sectors (defence, public sector, retail, etc.)
 * Familiarity with modern stacks (Python, cloud, Databricks, APIs, etc.)
 * Experience mentoring or leading junior team members

## Description

This is a hands-on leadership role - combining delivery, client engagement, and mentorship of other consultants.
What you'll be doing

 * Lead the design and delivery of AI and data science solutions (LLMs, NLP, ML, etc.)
 * Work directly with senior client stakeholders to shape and deliver solutions
 * Build and deploy end-to-end AI products, not just prototypes
 * Apply technologies such as LLMs, RAG systems, and agentic workflows to real business problems
 * Translate technical outputs into clear commercial value and measurable impact
 * Mentor and develop consultants, helping build capability across the team
 * Help shape the consultancy's AI offering and go-to-market approach

Example work

 * Using LLMs to improve decision-making and workflow automation in complex environments
 * Delivering predictive analytics in healthcare to improve outcomes and efficiency
 * Building AI-driven optimisation tools in retail to improve pricing and margins
 * Supporting large-scale programmes across defence and public infrastructure


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