Merrifield Consultants are supporting a fantastic charity for an exciting opportunity that has arisen for a Senior HR Advisor (Operational) to join a fast-paced and people-focused organisation. Reporting to the HR Business Partner, you will provide expert advice across all areas of employee relations and HR operations. You''ll play a key role in supporting managers, driving process improvements, and ensuring compliance with HR best practice and employment legislation.Details:Job: Senior HR AdvisorSalary: 20 - 22 per hourHours: Full time, 35 hours per weekLocation: London (hybrid after 1st month)Contract type: Temporary (potential temp to perm)Length: 3 months initiallyStart: ASAPKey Responsibilities: Deliver a high-quality, professional HR advisory service to managers and employees across the organisation. Lead on end-to-end case management, including absence, performance, disciplinary, grievance, and probation. Provide expert guidance on HR policies, procedures, and terms and conditions of employment. Build effective working relationships with stakeholders to resolve people challenges and drive best practice. Line manage and develop an HR Assistant, providing regular feedback and support. Work with the HR Systems and Compliance team to produce accurate management information and reports. Oversee HR operations such as contract changes, leavers, and right-to-work compliance. Contribute to HR policy reviews, training delivery, and continuous improvement initiatives. Support HR