Senior Estimator One Alliance

Mott Mac Donald Bentley are recruiting for a Senior Estimator to join the Anglian Water @One Alliance. As part of Anglian Water’s @one Alliance, we are on a mission to create a sustainable and resilient future for water. With an ambitious £2.3 billion capital investment in AMP8, we are revolutionising infrastructure, sustainability, and digital transformation to protect the environment and support growing communities.

We are looking for an experienced Estimator to Join the @one Alliance and play a key role in shaping the future of water infrastructure across the East of England. As a Senior Estimator, you will be a vital part of either our Central Estimating Team or embedded within a Business Unit, supporting a wide range of projects including Water & Water Recycling Treatment Plants, Pipelines and Pumping Stations & Reservoirs and Network Storage.

Working within an out performance contract model, you will lead on developing robust cost estimates while challenging all aspects of construction costs, risk, and overheads.

• Produce CAPEX estimates across optioneering, outline, and detailed design stages
• Collaborate with multi-disciplinary teams to define scope and buildability
• Engage with supply chain partners to obtain accurate quotations
• Prepare estimates using industry software and MS Excel

• Advise and challenge on design requirements and cost impacts
• Support delivery teams with estimating strategy and alliance processes
• Manage priorities and expectations across multiple stakeholders

• Mentor and support junior estimators
• Potential line management responsibilities
• Deputise for the Head of Estimating when required

• Develop and maintain cost models and libraries
• Identify efficiencies and implement best practice
• Maintain and analyse data within cost bases
• Ensure smooth handover of estimates to delivery teams
• Align estimates with Anglian Water cost capture requirements

• Ensure smooth handover of estimates to delivery teams
• Align estimates with Anglian Water cost capture requirements

• Champion a strong safety culture and “Safer Every Day” mindset
• Ensure compliance with all H&S policies and procedures
• Contribute to continuous improvement and a zero-accident culture

• An experienced Estimator ready for a senior role
• Educated to degree level (Engineering, Quantity Surveying) or equivalent experience
• Experienced in infrastructure, utilities, or construction environments
• Confident working across civil, mechanical, electrical, or process disciplines

• Strong analytical and numerical ability
• Excellent communication and collaboration skills
• Proactive, motivated, and eager to learn
• Highly organised and able to meet deadlines
• Advanced MS Office skills and familiarity with estimating software

At @one Alliance, you’ll be part of a dynamic, forward-thinking team that is shaping the future of the UK’s water infrastructure. We offer a collaborative and innovative working environment, where your expertise will be valued and your ideas will drive meaningful change.