Lead / Principal Consultant (AI & Data Science)
  • England,London,City of London
  • Full Time, Permanent
  • £90,000 - £125,000 per annum
Job Description:
Full job description

I’m hiring multiple senior hires to join a growing AI and Digital Transformation consulting practice within a premium consultancy. This team has recently secured significant investment and is scaling quickly, with multiple hires across Lead and Principal level.
This is a role for people who want to own and deliver real AI transformation, not just advise on it.
The companyA high-end consultancy working across defence, consumer, and public sector clients, known for delivering complex, high-impact programmes.
They’ve built a strong reputation on delivering measurable commercial outcomes, not just strategy - and are now investing heavily in expanding their AI capability to stay ahead of competitors.
Where you fitYou’ll sit within the Digital / AI Consulting practice, working directly with clients to:
*Identify opportunities for AI and advanced analytics
*Design and deliver solutions end-to-end
*Embed those solutions into real business operations
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
What you bringCore requirements*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
Why this role*Shape and scale a growing AI consulting capability
*Work on complex, high-impact projects across multiple industries
*Strong blend of technical delivery, commercial impact, and leadership
*High visibility internally and with clients
*Opportunity to progress to partner level over time
Working style*London base (or nearest office)
*Hybrid working, with regular client travel
*3 days total per week
*Flexible, project-led environment
Interview process*Online assessment (incl. logical / aptitude test)
*Informal first conversation (director-level, including short presentation)
*Final stage onsite in London (presentation + discussion)
Job number 3779698

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Company Details:
Harnham - Data & Analytics Recruitment
Company size: 250–499 employees
Industry: Recruitment Consultancy
Harnham are the global leaders in Data & Analytics recruitment.Harnham provides specialist Data & Analytics recruitment staffing services and talent s...
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