Senior​/Principal Engineering Geologist

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Tetra Tech is a leading provider of high-end consulting and engineering services for projects worldwide. We combine the strength of a global, multibillion-dollar organisation with local, client-focused delivery in more than 400 locations. We are Leading with Science® to provide sustainable and resilient solutions for our clients.

Our people are at the heart of everything we do. We take care of our team by offering flexible benefits, investing in professional development, and creating opportunities to work on technically challenging and rewarding projects.

Our Geo-Environmental Team is a dynamic group of around 100 specialists spread across 10 offices throughout the UK and Ireland, working across three core disciplines:

• Ground Investigation
• Land Quality & Remediation (including PFAS & EDD services)
• Groundwater & Geothermal

We serve key sectors including Energy, Water, Defence, Nuclear and Property. Over the last four years, we have grown our business by approximately 50%, and we have ambitious plans built on a clear strategy to continue this growth trajectory over the next 4-5 years.

What truly sets us apart is our culture. Here, you will be supported by a collaborative and inclusive team, trusted to take ownership of your work, challenged to grow your skills, and empowered to be ambitious in your career goals. We offer flexible working arrangements, including job shares and part-time opportunities, and attractive Chartership bonuses to reward your professional development milestones.

As part of our continued growth in Northern Ireland, we are seeking a Senior or Principal Engineering Geologist to join our Belfast-based Geo-Environmental team.

This role will focus on delivering and growing our ground investigation, land quality and geotechnical services across Northern Ireland. You will play a key role in strengthening our regional capability, developing client relationships and delivering technically robust, commercially successful projects.

Projects will predominantly be located in Northern Ireland, with opportunities to collaborate across Ireland and GB as required.

• Design, manage and interpret ground investigations from desk study through to factual and interpretative reporting
• Prepare Phase 1 and Phase 2 assessments and develop robust Conceptual Site Models
• Undertake geotechnical interpretation (GIR) including derivation of geotechnical parameters and engineering recommendations
• Prepare Geotechnical Design Reports (GDR) where required
• Provide advice on foundations, earthworks, slope stability, retaining structures and ground improvement
• Schedule and interpret laboratory testing (geotechnical and contamination)
• Undertake site visits and provide technical oversight of field operations
• Ensure compliance with relevant standards including BS5930, Eurocode 7 and current UK & NI guidance

• Prepare fee proposals and scopes of work
• Manage project budgets, programme and profitability
• Oversee subcontractors and laboratory providers
• Ensure high standards of health, safety and environmental management
• Maintain strong financial control and reporting
• At Principal grade, you will: Take accountability for financial performance of a portfolio of projects;
  Lead pricing strategy and tender submissions in the region;
  Support forecasting and workload planning

• Develop and maintain strong client relationships across Northern Ireland
• Identify new opportunities across infrastructure, energy, property and public sector markets
• Support framework delivery and regional marketing initiatives
• Represent Tetra Tech at industry and client meetings; At Principal grade, you will: Lead regional client account relationships;
  Play a key role in shaping and delivering our Northern Ireland growth strategy;
  Support cross‑selling of wider Geo-Environmental services

• Mentor and support junior team members;
  Contribute to technical excellence and quality assurance;
  Support the development…