Company Description

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

The Role

As a Payroll Administrator, you will play a key role in ensuring the accurate and timely processing of payroll for over 1,000 employees. Working closely with the Payroll & Benefits Manager, you will contribute to a reliable and customer-focused payroll function, while supporting benefits administration and ongoing process improvements.

The role is offered on a part time basis of 25 hours per week, to be worked over 5 days, with 2 days per week in the office.

Key Responsibilities

• Support the accurate and timely processing of monthly payroll, including starters, leavers and contractual changes
• Administer statutory payments, pensions and employee benefits in line with UK legislation
• Validate payroll data, carry out checks, and support reconciliations and reporting
• Maintain accurate records and ensure compliance with GDPR and company policies
• Respond to payroll queries and collaborate with internal teams and external providers
• Contribute to annual reward processes and continuous improvement of payroll practices

Qualifications

• Previous payroll experience with a solid understanding of UK payroll legislation
• Strong attention to detail, accuracy, and organisational skills
• Confident using Excel and payroll/HR systems
• Effective communicator with a customer-focused approach
• Discreet, proactive, and committed to continuous improvement

(CIPP qualification or willingness to study towards one is advantageous.)

Additional Information

• Be part of a purpose-driven organisation supporting the energy transition
• Work within a collaborative and supportive People team
• Gain exposure to payroll, benefits, and reward processes
• Opportunity to contribute to process improvements and team development
• Flexible, hybrid working environment

NOTICE TO CANDIDATES ON RECRUITMENT FRAUD - We are committed to safeguarding candidates from fraudulent activity associated with our recruitment process. Please note that we will never offer specialist CV writing services, request payment or ask for sensitive personal information during the recruitment process.

We are committed to equal treatment of candidates and promote, as well as foster all forms of diversity within our company. We believe that bringing together people with different backgrounds and perspectives is essential for creating innovative and impactful solutions. 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.