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ASSYSTEM

Engineering services for design, construction, commissioning

Change Manager

Full-TimePosted on 10/1/2026
No salary listed
Mid
Birmingham, UK
In Person

About the job

Requirements
  • Proven experience in contractual change management, project controls, commercial management, or contract administration.
  • Experience working on complex projects or programmes within energy, infrastructure, construction, engineering, or other major capital projects.
  • Strong understanding of the relationship between scope, cost, programme, and contractual change.
  • Experience managing change registers and formal change control processes.
  • Good understanding of contract mechanisms relating to variations, change orders, compensation events, instructions, and claims.
  • Experience assessing the impact of change on project cost and schedule.
  • Strong understanding of project controls and how changes affect the approved project baseline.
  • Experience working closely with Commercial, Planning, Cost, Project Management, and Contract teams.
  • Strong analytical and organisational skills, with attention to detail.
  • Ability to interpret contractual and project documentation and identify potential change.
  • Strong communication and stakeholder management skills.
  • Ability to challenge information and ensure changes are properly substantiated.
  • Ability to manage multiple changes across a complex project environment.
Responsibilities
  • Manage the end-to-end contractual change control process across projects and programmes.
  • Identify, record, and assess changes arising from scope, design development, client instructions, contractor proposals, unforeseen circumstances, and other project events.
  • Ensure all changes are formally documented, tracked, and progressed through the appropriate approval process.
  • Work closely with Commercial and Contract Management teams to assess the contractual and commercial implications of proposed changes.
  • Coordinate with Planning and Project Controls teams to assess the programme and schedule impact of changes.
  • Work with Cost teams to understand and validate the cost impact of changes.
  • Ensure changes are appropriately reflected in project baselines, forecasts, and reporting.
  • Maintain accurate and up-to-date change registers and supporting documentation.
  • Track changes from initial identification through assessment, approval, implementation, and close-out.
  • Prepare change papers, reports, and recommendations for project and governance review.
  • Monitor outstanding changes and ensure actions and approvals are progressed within agreed timescales.
  • Review change submissions and supporting information to ensure they are complete, accurate, and properly substantiated.
  • Identify potential changes and ensure they are captured early to minimise impact on project delivery.
  • Support the assessment of contractor and supplier change requests, variations, and compensation events.
  • Ensure contractual notices and change documentation are aligned with relevant contract requirements.
  • Provide regular reporting on change status, value, programme impact, trends, and emerging issues.
  • Analyse change trends to identify recurring issues, scope gaps, design development, or other drivers of project change.
  • Support project teams in maintaining a clear audit trail of all approved and rejected changes.
  • Contribute to continuous improvement of project change control processes, procedures, and governance.

About the company

Assystem provides engineering services for complex projects, covering design, construction, supervision, commissioning, and operation, with a strong focus on the nuclear and energy sectors. Its approach combines multidisciplinary engineering teams and project-management capabilities to move projects from initial concept through to operation. The company differentiates itself through a long track record, strategic acquisitions (including Alphatem in 1995 and Mactech Energy Group in 2025) and an early public offering in 2013, which have expanded its capabilities and market reach in the energy and nuclear fields. Its goal is to be a leading, reliable partner for clients by delivering end-to-end engineering services and helping them meet safety, performance, and regulatory requirements across the project lifecycle.

Company Size

5,001-10,000

Company Stage

IPO

Headquarters

Paris, France

Founded

1966

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Simplify's Take

What believers are saying

  • H1 2026 revenue grew 2.5% organically; nuclear grew 8.0%.
  • France delivered 4.2% organic growth on new-builds, fuel cycle, and digitalisation.
  • UK momentum accelerated after April 2026 SMR, CPS2, and MoD framework wins.

What critics are saying

  • Nuclear concentration leaves Assystem exposed if French EPR2 schedules slip beyond 2027.
  • H1 2026 international revenue fell from currency hits and project endings in India.
  • Rolls-Royce SMR still needs FID, regulatory clearance, and site decisions before revenue scales.

What makes ASSYSTEM unique

  • Assystem derived 81% of H1 2026 revenue from nuclear engineering.
  • April 2026 UK wins placed Assystem on CPS2 and MoD delivery frameworks.
  • January 2025 Mactech Energy Group deepened Assystem's UK nuclear construction capabilities.

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Benefits

Health Insurance

Dental Insurance

Vision Insurance

Unlimited Paid Time Off

Flexible Work Hours

Remote Work Options

Paid Vacation

Paid Holidays

Hybrid Work Options

401(k) Retirement Plan

Wellness Program

Mental Health Support

Gym Membership

Professional Development Budget

Conference Attendance Budget

Stock Options

Company Equity

Phone/Internet Stipend

Home Office Stipend

Relocation Assistance

Childcare Support

Meal Benefits

Parental Leave

Family Planning Benefits

Fertility Treatment Support

Company News

Yahoo Finance
Jul 23rd, 2026
Assystem's H1 revenue rises 2.5% organically to $371.2M on nuclear growth

Assystem reported consolidated revenue of €328.5 million for the first half of 2026, representing organic growth of 2.5% despite a 1.9% negative currency effect. The French engineering group's nuclear activities drove performance with 8.0% organic growth, accounting for 81% of total revenue. Revenue in France rose 4.2% organically to €201.1 million, led by strong momentum in nuclear new-builds and fuel cycle activities. International operations generated €127.4 million, remaining stable organically despite currency headwinds from the pound sterling, Indian rupee, and Saudi riyal. The UK showed robust growth in civil nuclear engineering and defence. However, business volumes declined in the Middle East, Central Asia region and India due to project endings and slower contract phasing. Assystem confirmed its full-year 2026 targets.

Yahoo Finance
Apr 23rd, 2026
Assystem posts $187.4M Q1 revenue with 2.2% organic growth driven by nuclear sector

Assystem, an international engineering group, reported first-quarter 2026 consolidated revenue of €165.8 million, representing 2.2% organic growth driven by strong nuclear sector performance of 8.0%. Nuclear activities accounted for 81% of total revenue, up from 76% in the prior year. French operations grew 4.4% to €102.6 million, driven by momentum in fuel cycle activities, new-builds and digitalisation. International revenue declined 7.1% to €63.2 million, primarily due to a 6.0% negative currency effect from the pound sterling, Indian rupee and Saudi riyal. The UK showed robust growth in civil nuclear engineering and defence. Assystem secured key positions on government frameworks and its client Rolls-Royce SMR signed a contract with Great British Energy for three small modular reactors.

Bdaily
Jan 30th, 2025
Assystem expands UK footprint with takeover

A global nuclear engineering firm has strengthened its UK presence with the acquisition of a specialist construction company. Paris-headquartered Assystem has… | North East | Construction | Engineering | International | Energy | Mergers & Acquisitions | Commercial Partnerships | Manufacturing & Construction |

Assystem
Jan 17th, 2024
Assystem acquires KEOPS Automation, engineering specialist in automated systems and data enhancement

Assystem, an international engineering, digital services and project management company, has acquired 100% of the shares of KEOPS Automation, a French company specializing in the integration of industrial operating platforms and the enhancement of their data (industrial OT and IT, automated systems, supervision systems, BI applied to manufacturing).

Global Construction Review
Jan 5th, 2024
France’s Assystem acquires India’s L&T Infrastructure Engineering - Global Construction Review

France-headquartered engineer and project manager Assystem has acquired India’s L&T Infrastructure Engineering, a subsidiary of the Larsen & Toubro group.