Location
London

Hours
Full Time

Salary
Negotiable

About the Role
Arcadis is the world's leading company delivering sustainable design, engineering, and consultancy solutions for natural and built assets. With over 34,000 people across more than 30 countries, we are dedicated to improving quality of life by solving complex challenges together.

The Senior Electrical & Mechanical Estimator leads the development and delivery of robust, accurate, and risk-informed capital cost estimates for complex multidisciplinary engineering and construction projects. This role focuses on electrical, mechanical, and MEP systems throughout the full project lifecycle, from concept and feasibility through detailed design and delivery, supporting both onshore and offshore programmes.

The Senior Estimator develops and owns the estimating strategy and execution plan, coordinating inputs from engineering, commercial, and project controls teams. They ensure estimates comply with Arcadis methodologies, governance, and industry best practices including CESMM4, ICMS2, and ICMS3. The role involves developing and maintaining integrated Cost Breakdown Structures (CBS) aligned with project Work Breakdown Structures (WBS) to ensure consistency, traceability, and effective cost control.

Working within a multidisciplinary estimating team, the Senior Estimator prepares, reviews, and assures detailed electrical and mechanical cost estimates, including indirect costs, allowances, risks, and opportunities. They maintain clear audit trails of assumptions, methodologies, benchmarks, and source data to support transparency and confidence in decision-making.

The role provides technical leadership during estimate reviews, supports independent assurance activities, and presents estimate outcomes and key cost drivers to leadership, project stakeholders, and senior management. Additionally, the Senior Estimator contributes to continuous improvement of estimating processes, mentors junior estimators, and supports the growth of Arcadis' estimating capability through knowledge sharing and coaching across major infrastructure, nuclear, defence, energy, and industrial programmes.

Key responsibilities include leading the preparation and delivery of complex electrical, mechanical, and MEP estimates across infrastructure, nuclear, defence, energy, transportation, and major capital projects; delivering accurate, timely, and risk-informed estimates; providing leadership, technical guidance, and quality assurance to junior estimators and project teams.

Experience
- Significant experience in electrical, mechanical, or MEP estimating.
- Proven track record producing estimates for large and complex capital programmes.
- Experience in sectors such as Nuclear, Defence, Energy, Utilities, Transportation, or Buildings.
- Strong understanding of Cost Breakdown Structures (CBS) and Work Breakdown Structures (WBS) development and integration.
- Working knowledge of CESMM4, ICMS2, and ICMS3 estimating and cost classification methodologies.
- Experience reviewing contractor pricing and commercial submissions.
- Strong stakeholder management, leadership, and technical review capabilities.

About you
- Strong leadership skills with the ability to mentor and coach junior and intermediate estimators.
- Excellent communication skills to present estimate outcomes to clients and senior stakeholders.
- Detail-oriented with a focus on quality assurance and compliance with estimating standards and governance.
- Ability to work collaboratively within multidisciplinary teams.
- Eligible to work in the UK (applications only accepted from candidates with right to work).

Qualifications
- Membership of a professional body such as CIOB, RICS, ICE, etc.
- Eligibility to obtain CTC and SC clearance.
- Proficient in key estimating and cost planning tools including CostX, Candy, Excel, Power BI, and benchmarking databases.
- Skilled in risk and uncertainty modelling, quantity take-off, cost planning, and cost assurance.
- Expertise in electrical systems estimating, mechanical and HVAC estimating, and MEP systems costing.