Senior HR Generalist in London

United Infrastructure is a leading infrastructure, construction, and property services company in the UK. We help our customers and the communities they serve benefit from resilient infrastructure, affordable homes, and improved living spaces that are fit for the future. Our mission is to be the partner and employer of choice for designing, building, maintaining, and connecting communities and critical infrastructure, to create a more sustainable and inclusive society.

The Senior HR Generalist supports the full employee lifecycle, combining hands‐on HR delivery with strategic partnering to align people initiatives with business goals. Operating as a standalone HR role for a workforce of approximately 70 employees, the position builds strong stakeholder relationships, ensures compliance with UK employment legislation, and contributes to the development and delivery of the organisation's people strategy.

A key initial priority is leading the implementation of an HRIS platform, overseeing its build, testing, and rollout to create a scalable, reliable system that underpins data‐driven decision‐making and supports the continued growth of Bree Construction.

• Support the full employee lifecycle, providing a proactive and commercially focused HR advisory service across the business.
• Act as a trusted HR Advisor, confidently managing employee relations matters including disciplinaries, grievances, and absence, ensuring fair and consistent application of policy and UK employment legislation.
• Lead and support organisational change initiatives, including restructures, consultations, and change management activities.
• Support the build, implementation, and ongoing maintenance of the HRIS, ensuring data integrity and optimising its use to support business growth.
• Develop, manage, and deliver training plans, ensuring employees and managers are equipped with the skills and knowledge required, with a strong focus on compliance.
• Oversee employee benefits administration, ensuring offerings remain competitive and aligned with business needs.
• Manage and coordinate the annual performance review cycle, supporting managers to drive a high‐performance culture.
• Take ownership as a standalone HR role, managing priorities independently while influencing stakeholders across all levels.
• Produce, analyse, and interpret people data and reports, supporting payroll processes, performance reviews, and strategic decision‐making.
• Ensure all HR policies, procedures, and practices remain compliant, up to date, and effectively communicated across the organisation.
• Support recruitment activities where required, ensuring a positive candidate experience and alignment with business needs.
• Coach and upskill line managers on HR best practice, improving capability across the business.

• Proven experience in a Senior HR Generalist or standalone HR role, managing the full employee lifecycle within an SME environment.
• Strong employee relations expertise, with confidence handling disciplinaries, grievances, restructures, and change management.
• Experience supporting or leading HRIS implementation, with good systems knowledge and data accuracy focus.
• Strong knowledge of UK employment legislation, with the ability to apply this in a practical, commercial way.
• Strong stakeholder management and organisational skills, with the ability to work independently, analyse people data, and influence decision‐making.