Assystem Energy & Infrastructure Limited
Company Information
Registered Address
Innovation Centre 1 Evolution Park Haslingden Road Blackburn BB1 2FD
Company Size
1001+ employees
Categories
Engineering design activities for industrial process and productionEngineering related scientific and technical consulting activities
Visa Information
Licensed Visa Types
skilled workerglobal business mobility: senior or specialist worker
Annual Issuance Trend
Salary & Roles Sponsored
Most sponsored roles at Assystem Energy & Infrastructure Limited paid £50k–£80k in 2024 (63% of 56 workers sponsored).
Certificates of Sponsorship issued, grouped by role (SOC 2010) and salary band. Source: Home Office.
Gender pay gap
Women's typical hourly pay is 16.4% lower than men's at Assystem Energy & Infrastructure Limited (2025/26 reporting year).
Typical hourly pay gap
16.4%men are paid more
Average hourly pay gap
14.4%men are paid more
Typical bonus gap
48.3%men are paid more
Average bonus gap
51.8%men are paid more
Who holds the highest-paid jobs?
Highest-paid 25%
79% men
21% women
Upper-middle 25%
76% men
24% women
Lower-middle 25%
72% men
28% women
Lowest-paid 25%
60% men
40% women
MenWomen
Women hold 21% of the highest-paid jobs at Assystem Energy & Infrastructure Limited but 40% of the lowest-paid ones. More men in senior roles is usually what drives a pay gap.
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See whether this employer's pay gap is closing or widening year over year.
Source: UK Government Gender Pay Gap Service. UK employers with 250 or more employees must publish these figures every year.
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Jobs (~3 days delayed) in United Kingdom
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Today, Assystem is among the top three independent nuclear engineering firms worldwide. With over 60 years of experience in highly regulated sectors, the group supports public and industrial stakeholders in the execution of complex and strategic infrastructure projects, subject to high safety and security requirements. Assystem mobilizes 8,000 experts in 13 countries and intervenes across the entire project lifecycle, in engineering, project management and digital solutions. Job Description 🚀 Jo
6/10/2026
🚀 The Job Mission This hybrid role is suited to candidates able to commute to project locations or relocate nearby, with support available. You will provide cost management, forecasting and performance reporting support within the Quality PMO. Working closely with your future team, you will help ensure quality programmes are financially controlled and effectively governed. Develop and maintain cost tracking systems for quality programme management activities. Monitor expenditure against budgets
6/10/2026
🚀 Join the Fusion and Modular Nuclear Business Unit! 🚀 Reporting to the FEED Engineering Manager you will be responsible for Delivering Front Engineering activities for Small Modular Reactors, Advanced Modular Reactors and Fusion projects. The Principal Engineer shall work closely with multi-disciplined teams and will deliver scope through leadership of an engineering design team. Your mission: Spearheading the delivery of cutting-edge power station systems! Taking charge of optioneering stud
6/10/2026
🚀 Join the Fusion and Modular Nuclear Business Unit! 🚀 Reporting to the FEED Engineering Manager you will be responsible for Delivering Front Engineering activities for Small Modular Reactors, Advanced Modular Reactors and Fusion projects. The Principal Engineer shall work closely with multi-disciplined teams and will deliver scope through leadership of an engineering design team. Your mission: Spearheading the delivery of cutting-edge power station systems! Taking charge of optioneering stud
6/10/2026
🚀 Join the Fusion and Modular Nuclear Business Unit! 🚀 Reporting to the FEED Engineering Manager you will be responsible for Delivering Front Engineering activities for Small Modular Reactors, Advanced Modular Reactors and Fusion projects. The Principal Engineer shall work closely with multi-disciplined teams and will deliver scope through leadership of an engineering design team. Your mission: Spearheading the delivery of cutting-edge power station systems! Taking charge of optioneering stud
6/10/2026
🚀 Join the Fusion and Modular Nuclear Business Unit! 🚀 Reporting to the FEED Engineering Manager you will be responsible for Delivering Front Engineering activities for Small Modular Reactors, Advanced Modular Reactors and Fusion projects. The Principal Engineer shall work closely with multi-disciplined teams and will deliver scope through leadership of an engineering design team. Your mission: Spearheading the delivery of cutting-edge power station systems! Taking charge of optioneering stud
6/10/2026
🚀 Join the Fusion and Modular Nuclear Business Unit! 🚀 Reporting to the FEED Engineering Manager you will be responsible for Delivering Front Engineering activities for Small Modular Reactors, Advanced Modular Reactors and Fusion projects. The Principal Engineer shall work closely with multi-disciplined teams and will deliver scope through leadership of an engineering design team. Your mission: Spearheading the delivery of cutting-edge power station systems! Taking charge of optioneering stud
6/10/2026
Today, Assystem is among the top three independent nuclear engineering firms worldwide. With over 60 years of experience in highly regulated sectors, the group supports public and industrial stakeholders in the execution of complex and strategic infrastructure projects, subject to high safety and security requirements. Assystem mobilizes 8,000 experts in 13 countries and intervenes across the entire project lifecycle, in engineering, project management and digital solutions. Job Description 🚀 Jo
6/10/2026
Today, Assystem is among the top three independent nuclear engineering firms worldwide. With over 60 years of experience in highly regulated sectors, the group supports public and industrial stakeholders in the execution of complex and strategic infrastructure projects, subject to high safety and security requirements. Assystem mobilizes 8,000 experts in 13 countries and intervenes across the entire project lifecycle, in engineering, project management and digital solutions. Job Description 🚀 Jo
6/10/2026
Programme Manager (Infrastructure Programmes Lead)Assystem Energy & Infrastructure Limited
Today, Assystem is among the top three independent nuclear engineering firms worldwide. With over 60 years of experience in highly regulated sectors, the group supports public and industrial stakeholders in the execution of complex and strategic infrastructure projects, subject to high safety and security requirements. Assystem mobilizes 8,000 experts in 13 countries and intervenes across the entire project lifecycle, in engineering, project management and digital solutions. Job Description Posi
Today, Assystem is among the top three independent nuclear engineering firms worldwide. With over 60 years of experience in highly regulated sectors, the group supports public and industrial stakeholders in the execution of complex and strategic infrastructure projects, subject to high safety and security requirements. Assystem mobilizes 8,000 experts in 13 countries and intervenes across the entire project lifecycle, in engineering, project management and digital solutions. Job Description 🚀 Jo
Today, Assystem is among the top three independent nuclear engineering firms worldwide. With over 60 years of experience in highly regulated sectors, the group supports public and industrial stakeholders in the execution of complex and strategic infrastructure projects, subject to high safety and security requirements. Assystem mobilizes 8,000 experts in 13 countries and intervenes across the entire project lifecycle, in engineering, project management and digital solutions. Job Description 🚀 Jo
6/10/2026
⚡️💡 About Assystem Today, Assystem is among the top three independent nuclear engineering firms worldwide. With over 60 years of experience in highly regulated sectors, the group supports public and industrial stakeholders in the execution of complex and strategic infrastructure projects, subject to high safety and security requirements. Assystem mobilizes 8,000 experts in 13 countries and intervenes across the entire project lifecycle, in engineering, project management and digital solutions. 🤝
6/10/2026
Civil EngineerAssystem Energy & Infrastructure Limited
⚡️💡 About Assystem At Assystem, our mission is to accelerate the energy transition worldwide. Our 8,000 Switchers blend historical engineering expertise with cutting-edge digital technologies to drive this change. Join us in revolutionizing the energy sector and making a significant global impact. 🤝 Why Join the Community of Switchers? Be part of one of the top three largest independent nuclear engineering companies globally. At Assystem, you'll contribute to groundbreaking projects that push th
6/9/2026
Senior Facility / Project Engineer 📍 Location: Reading. Outside IR35, Inside IR35 and staff opportunities available We are seeking experienced Facility / Project Engineers (1 x Mechanical 1x Control & Instrumentation bias) This is a delivery-focused, task-based role where you will play a critical part in ensuring safe, compliant, and efficient operations by resolving engineering challenges, improving assets, and bridging the gap between facility operations and project delivery. Your Missions
6/9/2026
Senior Mechanical Engineer - Pressure ComplianceAssystem Energy & Infrastructure Limited
Working on a Nuclear Power Plant project, the Senior Mechanical Engineer will report to the Equipment Pressure Compliance Manager and will take responsibility for managing the pressure systems compliance and structural integrity requirements on behalf of a specific scope identified by the Programme Pressure Compliance Team Leader, ensuring appropriate implementation and compliance to meet project needs. The role holder will support the implementation of pressure systems compliance and structural
6/9/2026
Civil EngineerAssystem Energy & Infrastructure Limited
As a Civil Engineer – Enabling & Earthworks , you will join the Civil Works Programme (CWP) for a major nuclear project, with a total scope valued at approximately £9 billion . The Civil Works Programme is divided into three key sub-programmes: Enabling & Earthworks Main Civils & Ancillary Works Marine & Tunnelling This role acts as an Interface Engineer, and this Integration function within the Civil Works Programme is the focal point in supporting the co-ordination of the activities in each o
6/9/2026
Today, Assystem is among the top three independent nuclear engineering firms worldwide. With over 60 years of experience in highly regulated sectors, the group supports public and industrial stakeholders in the execution of complex and strategic infrastructure projects, subject to high safety and security requirements. Assystem mobilizes 8,000 experts in 13 countries and intervenes across the entire project lifecycle, in engineering, project management and digital solutions. Job Description Your
Today, Assystem is among the top three independent nuclear engineering firms worldwide. With over 60 years of experience in highly regulated sectors, the group supports public and industrial stakeholders in the execution of complex and strategic infrastructure projects, subject to high safety and security requirements. Assystem mobilizes 8,000 experts in 13 countries and intervenes across the entire project lifecycle, in engineering, project management and digital solutions. Job Description Seni
Senior Mechanical Engineer - Pressure ComplianceAssystem Energy & Infrastructure Limited
⚡️💡 About Assystem At Assystem, our mission is to accelerate the energy transition worldwide. Our 8,000 Switchers blend historical engineering expertise with cutting-edge digital technologies to drive this change. Join us in revolutionizing the energy sector and making a significant global impact. 🤝 Why Join the Community of Switchers? Be part of one of the top three largest nuclear engineering companies globally. At Assystem, you'll contribute to groundbreaking projects that push the boundaries