Data EngineerNcounter are supporting a specialist technology consultancy delivering advanced data and AI platforms into highly secure Government and Defence environments. We are seeking a DV Cleared Consultant Engineer to join a growing engineering practice working at the sharp end of national security programmes. This is a deeply technical, hands on role suited to engineers who enjoy solving complex data integration and workflow challenges within secure, mission critical settings.Core experience required:• Active DV clearance, with willingness to work onsite within secure UK locations • Strong software engineering capability in Python, SQL and TypeScript • Proven delivery of complex data engineering solutions across cloud and on prem environments • Experience designing and optimising ETL pipelines and data models at scale • Ability to integrate AI or machine learning components into operational systems • Confident stakeholder engagement within Defence or other classified programmesYou will operate across the full engineering lifecycle, translating ambiguous operational problems into robust technical designs and scalable implementations. Working closely with end users and technical stakeholders, you will design and build secure data pipelines, engineer ETL processes, and develop operational workflows that drive real world decision advantage. Exposure to Palantir style platforms such as Foundry or Gotham, or similar large scale data integration environments, is highly desirabl