Estimator, Engineering, Civil Engineering

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 and diverse 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.

• 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
• 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 is seeking an experienced Estimator to join our Water Division, supporting the successful delivery of water and wastewater infrastructure projects across the UK. The successful candidate will have proven estimating experience within the UK water sector, developing accurate and commercially robust cost estimates for projects from early-stage opportunities through to tender submission and contract award.
Essential - must have previous water industry experience.

• Prepare detailed estimates for water and wastewater infrastructure projects.
• Review tender documentation, drawings, specifications and client requirements.
• Develop first-principles estimates, cost models and pricing schedules.
• Obtain and evaluate supplier and subcontractor quotations.
• Identify risks, opportunities, assumptions and exclusions within tender submissions.
• Collaborate with engineering, commercial, procurement and operational teams throughout the bidding process.
• Support value engineering initiatives and cost optimisation opportunities.
• Maintain estimating records, benchmarking data and historical cost information.
• Participate in tender, risk and commercial review meetings.
• Support project handovers following contract award.

• Proven estimating experience within the UK water sector.
• Experience pricing water and/or wastewater infrastructure projects.
• Strong understanding of relevant construction methodologies and delivery practices.
• Ability to interpret drawings, specifications and tender documentation.
• Commercial awareness with the ability to assess project risks and opportunities.
• Experience managing supplier and subcontractor pricing exercises.
• Strong analytical, numerical and problem-solving skills.
• Proficiency in Microsoft Excel and estimating software.
• Excellent communication and stakeholder management skills.

Our values stand on a foundation of safety, integrity, inclusion and…