Laing O'Rourke
HR People Partner

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Senior HR Advisor
Sizewell C | Ipswich with travel to London (min 2 days per week)
Permanent
Help shape the team behind one of the UK's most significant infrastructure projects
Sizewell C is playing a critical role in delivering Britain's clean energy future. As one of the largest infrastructure projects in the UK, we are building the teams, capability and culture needed to deliver a new generation of nuclear power.
We are looking for a Senior HR Advisor to join our Central Functions HR team, supporting leaders and employees across a diverse and growing project environment. This is an opportunity to influence people's decisions, support organisational growth and help create a positive employee experience on a nationally significant programme.
The Opportunity
Reporting to the HR Business Partner, you will provide practical HR support and guidance across a broad range of people activities. Working closely with managers and stakeholders, you will help deliver people initiatives, support organisational change and contribute to building a high-performing and inclusive workplace.
What You Will Be Doing
As a Senior HR Advisor, you will work closely with leaders and employees across the Sizewell C project, providing practical people support that enables teams to perform at their best. You will play a key role in delivering people initiatives, supporting organisational growth and helping managers navigate the day-to-day challenges that come with a large and evolving project environment. This is a varied role offering exposure to a broad range of HR activities, stakeholder groups and strategic people priorities.
- Partnering with managers to provide practical advice and support on a wide range of people matters.
- Supporting recruitment, onboarding and workforce planning activities across the project.
- Contributing to organisational change, employee engagement and wellbeing initiatives.
- Using people data and insight to identify trends, support decision making and help drive continuous improvement.
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What We're Looking For
We are looking for someone who enjoys building strong relationships, supporting others and finding practical solutions to people challenges. You will be comfortable working in a fast-paced environment, balancing multiple priorities and partnering with managers to deliver positive outcomes. Whether your experience has been gained within construction, infrastructure, engineering or another complex organisation, we are interested in hearing from people who bring curiosity, sound judgement and a collaborative approach to their work.
You Will Likely Bring
- Experience in a generalist HR role within a fast-paced or complex organisation.
- Strong relationship-building skills with the ability to work collaboratively with managers and stakeholders.
- A good understanding of HR policies, processes and employment legislation.
- CIPD Level 5 qualification, equivalent experience, or a commitment to continuing your professional development.
- Experience within construction, infrastructure, engineering, utilities or other project-based environments would be beneficial, but is not essential.
Why Sizewell C?
This is an opportunity to be part of a project that will have a lasting impact on the UK's energy future while developing your own career in a collaborative and supportive environment.
What You Can Expect
- Joining Sizewell C means becoming part of a project that is helping to shape the UK's energy future. You will work alongside experienced professionals from a wide range of disciplines, gaining exposure to complex people challenges and opportunities that will support your ongoing development. Whether you are looking to deepen your HR expertise, broaden your stakeholder experience or contribute to a project of national significance, this role offers the chance to make a real impact while continuing to grow your career.
- The opportunity to work on one of the UK's most ambitious infrastructure programmes.
- Exposure to a wide range of people challenges, projects and stakeholders.
- Ongoing development and opportunities to broaden your HR experience.
- A supportive team environment where different perspectives and ideas are valued.


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At Sizewell C, we are committed to creating an inclusive workplace where everyone can thrive. We welcome applications from people of all backgrounds and experiences and recognise that diverse teams deliver stronger outcomes.
If you are looking for a role where you can make a meaningful contribution while continuing to develop your HR career, we would love to hear from you.
About Us
We are an international engineering and construction company delivering state-of-the-art infrastructure and buildings projects for clients in the UK, Middle East and Australia.
Certainty, reliability, quality – this is what our clients want. And at Laing O'Rourke, we have more than 150 years of experience delivering it. Laing O'Rourke's story is one of energy, passion, ambition, people and teamwork. We harness the power of our experience, stretching back over a century and a half to deliver certainty for our clients.
As part of the Disability Confident scheme, we would like to enable access to candidates with long term health conditions and disabilities through the ‘Offer an interview scheme'. This supports applicants that meet the essential criteria by offering an interview for the advertised position. Please let us know prior to interview what adjustments are required as well as discussing how we can support you in the workplace.
We want to ensure our recruitment process is accessible to all. If you need the application form in an alternative format or you would like to know more about our recruitment process, please email resourcingteam@laingorourke.com
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