Overview

Assystem is an international company with one mission: accelerate the energy transition around the world. Every day, our 7,500 switchers located in 12 countries connect their expertise to tackle the task of the century: switching to low-carbon energy. We provide engineering and project management services, as well as digital services and solutions to optimize the performance of complex infrastructure projects throughout their life cycle.

Your future team

Are you ready to make a real impact by supporting the delivery of vital military capability? Join our team as a Principal Estimator, where your expertise will help shape the future of defence programmes.

Your missions

As a Principal Estimator, you’ll play a critical role in managing the cost and financial aspects of high-value defence programmes — from bid to completion:

• Develop and implement effective estimating processes and techniques
• Ensure forecasts for bids and contracts are robust, accurate, and integrated
• Collaborate with Risk, Cost Control, and Scheduling teams for cohesive project delivery

Your Day-to-Day Responsibilities

• Establish and maintain best-practice estimating systems across the portfolio
• Standardise approaches across projects and align with Project Controls
• Develop Work-in-Progress (WIP) and Estimate at Completion (EAC) forecasts
• Support bid proposals and contract change estimates
• Contribute to Cost Breakdown Structure (CBS) development
• Coordinate closely with other discipline leads for integrated estimating

Why join the community of Switchers?

As one of the Top 3 Nuclear Engineering companies in the world, Assystem offers a competitive benefits package which includes:

• 25 days of annual leave + bank holidays
• 8% company pension contributions
• Healthcare cash-plan to get money back on dental, medical, physical care
• Employee assistance programme including 24/7 access to free mental health support, virtual gym classes and more
• Get professional and industry membership fees paid for

Qualifications

Qualifications/Skills to be successful:

• Proven experience as an Estimator in complex project environments
• Solid understanding of Project Controls principles and disciplines
• Experience working on bids, proposals, or large-scale programmes

Additional Information

• Permanent Staff or Umbrella Contract position
• Hybrid, 2 days per week at Client site in Bristol

Please be aware that many roles at Assystem are subject to security and export control restrictions. These restrictions may limit eligibility by nationality, previous nationalities, or place of birth. All applicants must meet Baseline Personnel Security Standard and many roles require higher levels of National Security Vetting (typically 5 to 10 years of continuous UK residency for the vetting level required).

We are committed to equal treatment of candidates and promote diversity. Skills, talent, and our people’s ability to dare are the only things that matter. Bring your unique contributions and help us shape the future.

Seniority level

Executive

Employment type

Full-time

Job function

Project Management

Industries

Business Consulting and Services