Senior HR Business Manager

Chesamel Group is an agile consultancy headquartered in London, focused on driving extraordinary growth for forward-thinking businesses through innovative, bespoke solutions. The team challenges traditional thinking to deliver transformative business outcomes using human ingenuity and advanced technology. We listen with intent, connect brilliant minds, develop bold ideas, and create solutions so our partners achieve extraordinary success.

We are seeking a commercially driven Senior HR Manager to lead our people operations. This is a high-impact, hands-on role for a professional who prioritises execution and operational excellence within a fast-paced agency environment. While overseeing a team, you will remain deeply involved in daily HR delivery, building the processes required to maintain organisational momentum and addressing evolving operational needs. You will lead by example personally managing complex employee relations, compliance, and recruitment to ensure all people operations are executed with precision. This is an ideal opportunity to take full ownership of an HR function and accelerate your career progression.

Key Responsibilities

• Operational Partnership: Collaborate with leadership to deliver on departmental objectives and resolve real-time personnel requirements.
• Team Leadership: Manage and mentor a team of HR professionals, ensuring a high standard of service delivery across the business.
• Implementation: Execute structural changes and manage the full administrative lifecycle of organisational transitions.
• Employee Relations: Act as the lead practitioner for complex ER matters, including investigations, grievances, and disciplinary procedures.
• Performance Management: Oversee the implementation of performance review cycles and manage formal improvement plans (PIPs).
• Global Coordination: Partner with international stakeholders to ensure regional HR workflows remain compliant and consistent.
• Data Integrity: Maintain HRIS standards to ensure data accuracy and provide detailed reporting for executive review.

Key Requirements

• Proven Experience: Extensive background as a Senior HR Manager or Senior HRBP within a fast-paced agency or commercial setting.
• Execution Focus: Demonstrated ability to manage projects from initial concept through to practical, final completion.
• Technical Knowledge: Comprehensive knowledge of UK employment law, experience of global law, and the ability to apply HR best practices to daily operations.
• Operational Mentality: Experience in team management alongside a willingness to engage directly with casework and administrative tasks.

What We’re Looking For

• An Accomplished Operator: A professional who prioritises meticulous detail and the successful completion of task-based objectives.
• Direct Leadership: A leader who ensures no task is overlooked, regardless of its scale, and thrives on being "close to the work."
• Adaptability: A proactive, solutions-oriented mindset with strong resilience leadership and urgent, hands-on problem solving.
• Ambition: Someone who thrives in dynamic, fast-paced environments.

Why Join Us?

• High Autonomy: The opportunity to manage and refine the end-to-end HR function within a global organisation.
• Direct Impact: A role where your daily output has a visible and immediate effect on business efficiency.
• Clear Progression: A structured environment that rewards operational excellence with a path toward senior leadership.
• Exposure: to complex, international business challenges.