HR Manager
ONI
People & HR
Oxford, UK
As the HR Manager you will be responsible for:
Oversee end-to-end HR operations across onboarding, offboarding, payroll coordination, and employee records management.
Ensure compliance with UK employment legislation and alignment where appropriate with US and European practices.
Implement and maintain clear, business-led HR policies and procedures, ensuring they are compliant, practical, and scalable.
Own and manage the HR tech stack (e.g. ADP, iHCM, Lever), including reporting, data integrity, and identifying opportunities to simplify and automate processes.
Maintain and audit accurate employee records and documentation in line with GDPR requirements.
Draft and manage employment contracts, letters, and HR documentation.
Administer UK benefits programmes, liaising with providers, payroll, and internal systems.
Provide proactive guidance and coaching to functional leaders on organisational design, career frameworks, and performance management.
Support and upskill managers to effectively use HR tools and drive a high-performance, continuous improvement culture.
Manage and resolve complex employee relations cases, including disciplinaries, grievances, and investigations, ensuring fair and consistent outcomes.
Partner with hiring managers and the Talent Acquisition team to support end-to-end recruitment, particularly during peak hiring periods.
Contribute to candidate screening, interviewing, and stakeholder management.
Support the development and maintenance of a global library of job descriptions and person specifications.
Ensure a seamless pre-boarding and onboarding experience, working closely with hiring managers to deliver high-quality inductions.
Continuously improve recruitment and onboarding processes to enhance candidate and new starter experience.
Provide input into remuneration and benefits strategy, including benchmarking and analysis where needed.
Support organisational design and workforce planning initiatives.
Contribute to global HR projects, ensuring alignment and consistency across regions.
HR Operations & Employee Lifecycle
Employee Relations & Advisory
Talent Acquisition & Onboarding
People Strategy & Projects
Skills & Experience
Proven experience in a hands-on HR Manager or HRBP role, ideally in a scaling or international business.
Strong working knowledge of UK employment law and HR practices.
Experience managing employee relations cases end-to-end.
Exposure to talent acquisition and recruitment processes.
Experience working with HR systems (e.g. ADP, Lever or similar).
Strong organisational skills with the ability to manage both operational and strategic priorities.
At ONI, we understand that a fulfilling career involves more than just challenging work - it's about enjoying a well-rounded experience. When you become a part of our team, you not only contribute to groundbreaking research but also enjoy a range of benefits designed to enhance your life both inside and outside the workplace.