Overview A leading infrastructure consultancy is seeking a skilled and experienced Principal Geologist to manage the technical delivery of complex ground investigation projects. This is a senior leadership role focused on project oversight, technical assurance, client engagement, and team development. You’ll be responsible for shaping investigation strategies and ensuring the highest standards of geotechnical data, analysis, and reporting across a portfolio of national infrastructure schemes. Key Responsibilities Technical Leadership Lead the planning and delivery of ground investigation (GI) works Provide technical guidance to teams on logging, in-situ testing, sampling, and AGS data management Review and approve factual and interpretative reports to ensure accuracy and compliance with standards Manage reporting in accordance with BS5930, EC7, and project specifications Act as technical lead on multi-disciplinary project teams Project & Client Oversight Scope and manage GI packages, ensuring timely and cost-effective delivery Oversee subcontractors and ensure H&S compliance on all active sites Support tendering and proposal writing for new project bids Attend client meetings, provide briefings, and act as a key point of contact throughout project life cycles Mentoring & Development Mentor junior and mid-level staff, supporting Chartership and RoGEP progression Lead internal CPD sessions and promote knowledge sharing within the team Help shape and grow technical standards, best practice processes, and quality frameworks Requirements Degree in Geology, Engineering Geology, or Geotechnical Engineering Chartered status (CGeol or CEng) Minimum 10 years’ experience in ground investigation or geotechnical consultancy Proven experience leading and delivering GI works on major civil engineering or infrastructure projects Strong understanding of UK GI standards (BS5930, EC7) and AGS data formats Excellent communication and leadership skills Familiarity with HoleBASE, gINT, or other logging/reporting platforms Full UK driving licence CSCS card or equivalent certification