Water Sector Estimator

About the role

Amentum is seeking an experienced Estimator to join its Water Division, supporting the delivery of water and wastewater infrastructure projects across the UK. The successful candidate will have proven estimating experience in the UK water sector, producing accurate and commercially robust cost estimates from early-stage opportunities through to tender submission and contract award.

Key responsibilities

• 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 in tender submissions.
• Collaborate with engineering, commercial, procurement and operational teams during bidding.
• Support value engineering and cost optimisation, and maintain estimating records and historical cost data.
• Take part in tender, risk and commercial review meetings and support project handovers after contract award.

Required profile

• Proven estimating experience in the UK water sector (essential).
• Experience pricing water and/or wastewater infrastructure projects.
• Strong understanding of construction methodologies and delivery practices.
• Ability to interpret drawings, specifications and tender documentation.
• Commercial awareness and experience managing supplier and subcontractor pricing.

Required skills

• Proficiency in Microsoft Excel and estimating software.
• Strong analytical, numerical and problem-solving skills.
• Excellent communication and stakeholder management skills.

What we offer

• Competitive package including free single medical cover and digital GP service for UK employees.
• Family-friendly benefits such as enhanced parental leave pay and free membership of employee assistance and parental programmes.
• Reimbursement towards professional development and memberships.
• Flexible working arrangements, including hybrid, part-time and flexible hours and location.