Senior/Principal Engineering Geologist

Company: Tetra Tech, Inc.

Location: Northern Ireland

Posted: April 17th, 2026

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Purpose & Scope of the Role

Join a growing Geo-Environmental team of around 100 specialists across the UK and Ireland, delivering expertise in ground investigation, land quality & remediation, and groundwater & geothermal services. This role supports continued expansion in Northern Ireland, focusing on technically robust delivery and sustainable growth across sectors including Energy, Water, Defence, Nuclear and Property. You will contribute to strengthening regional capability, enhancing client relationships and delivering high-quality, commercially successful projects, primarily in Northern Ireland with collaboration opportunities across the wider business.

Your Impact in this Position

You will play a central role in shaping project outcomes from early-stage assessment through to detailed geotechnical design and reporting. Your work will directly influence safe, sustainable development by managing ground risk and delivering practical engineering solutions. At Principal level, you will also drive regional growth, lead client relationships and contribute to strategic direction, helping expand both capability and market presence.

Core Capabilities

Technical Delivery

Project & Commercial Management

Business Development & Growth

Leadership & Mentoring

Strategic & Regional Leadership (Principal level)

Skills, Qualifications & Experience

Degree (ideally MSc) in Engineering Geology, Geotechnical or Civil Engineering, with strong experience in ground investigation and geotechnical interpretation. You will bring excellent technical judgement, report writing and client-facing skills, alongside a solid understanding of health, safety and environmental practice. Chartered status (or working towards) is beneficial. For Principal level, experience in winning work, leading projects and managing financial performance is expected.

Working Environment

This role is based in Belfast, with projects primarily across Northern Ireland and opportunities to collaborate across Ireland and Great Britain. Flexible and hybrid working options are available, including part-time and job share arrangements. Expect a balanced mix of office, site and remote working, with regular in-office collaboration to support team development and project delivery.

Equal Opportunity Statement

In alignment with the Equality Act 2010, we will make reasonable adjustments to support candidates and employees requiring additional arrangements. This could include adaptations to work schedules, training approaches, or the physical workspace. Please inform us if you need any accommodations during the recruitment process or in your day-to-day role.

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