Senior Hydrogeologist

At Amentum, we're not just solving problems; we're engineering the future. Our team is driven by an unyielding commitment to innovation, integrity, and collaboration, tackling some of the most significant challenges in science, security, and sustainability. If you're passionate about making a real impact and want to be part of a community that values ethical excellence, this is the place where your ambition can thrive.

Here, we believe that success comes from continuously pushing boundaries and working together to deliver on our promises. We embrace challenges with confidence and are dedicated to creating a secure and vibrant future for all.

We’ll inspire and empower you to deliver your best work so you can evolve, grow and succeed – today and into tomorrow. We offer an exciting range of opportunities to develop your career within a supportive team who always strive to do the right thing for our people, clients and communities.

People are our greatest asset, and we offer a competitive package to retain and attract the best talent.

In addition to the benefits you’d expect, UK employees also receive free single medical cover and digital GP service, family-friendly benefits such as enhanced parental leave pay and free membership of employee assistance and parental programmes, plus reimbursement towards relevant professional development and memberships.

Work-life balance and flexibility is a key focus area for us. We’re happy to discuss hybrid, part-time and flexible working hours, patterns and locations to suit you and our business.

Amentum provides client-oriented solutions across our environment, energy, and defence businesses. With a strong order book and a diverse, exciting portfolio of projects across the UK and internationally, we need to expand our team of environmental specialists across multiple disciplines required to deliver a project lifecycle—from new build and operations through to decommissioning and site end use. We offer opportunities for significant career advancement, attractive remuneration, and flexible working, as well as leadership and client relationship role development.

We are looking for a Senior Hydrogeologist to support our ongoing new‑build, contaminated land and decommissioning projects across our environment, energy and defence businesses. In this role, you will work closely with colleagues to input into and design site investigations, data interpretation, risk assessments, and remediation and ground water management design, as well as supporting hydrogeological numerical modelling. This is an excellent opportunity to develop your technical skills and progress in a highly regulated and dynamic field.

We offer flexible working arrangements (a mix of office‑based and home working). This role can be based in Harwell, Bristol, Rotherham, Cumbria or Birchwood.

• Participate in site investigation design and interpretation (focused on hydrogeological investigations to support a range of project scales and site end uses). Provide supervision and advise on hydrogeological testing and monitoring strategies.
• Data Analysis & Reporting:
  Assist in interpreting field and laboratory results, contributing to conceptual site models (CSMs) and preliminary groundwater risk assessments. Work with numerical modellers to develop site and regional scale hydrogeological models for large scale and long term contaminant migration studies and to support the design of complex groundwater management and control projects.
• Input into site and regional scale flood risk assessments.
• Collaboration:
  
  Work alongside junior and senior consultants and project managers and meeting deadlines.
• Regulatory Awareness:
  Learn and apply relevant UK environmental legislation, guidance, and codes of practice.
• Health & Safety Compliance:
  Adhere to strict HSE requirements, both on‑site and in office environments, ensuring you and your colleagues maintain safe working conditions.
• Professional Development:
  Seek opportunities to broaden your technical knowledge (through project work, training, and mentoring), and actively engage in personal development plans.

Below are…