Simpson Thacher & Bartlett LLP
Senior / HR Manager – Brussels and Luxembourg
Simpson Thacher & Bartlett LLPLuxembourg3 days ago
Full-timeHuman Resources
The firm

Simpson Thacher & Bartlett LLP is one of the world’s leading international law firms. The Firm was established in 1884 and has more than 1,000 lawyers. Headquartered in New York with offices in Beijing, Brussels, Hong Kong, Houston, London, Los Angeles, Luxembourg, Palo Alto, São Paulo, Tokyo and Washington, D.C., the Firm provides coordinated legal advice and transactional capability to clients around the globe.

Description/Job Summary

Simpson Thacher & Bartlett LLP is one of the world’s leading international law firms, advising many of the most respected companies and financial institutions. With offices across key global financial hubs, we recently expanded our presence in Europe opening our Brussels office in September 2021 and our Luxembourg office in April 2025.

We are now seeking an experienced and dynamic Senior / HR Manager to support and help shape our people strategy across Brussels and Luxembourg.

This is a pivotal role at the heart of Simpson Thacher’s European growth story. As the Senior / HR Manager, you will be responsible for driving HR excellence, fostering engagement and ensuring operational and strategic alignment across these offices.

You’ll act as the first point of contact for partners, fee earners and employees in Brussels and Luxembourg, providing trusted HR advice and will play a key role in shaping and executing HR strategy for these offices in collaboration with the Head of HR - London.

Responsibilities/Duties

  • Lead the development, implementation, and refinement of HR policies and procedures in compliance with local employment law.
  • Collaborate with HR leaders globally to promote a “One Firm” culture and strategic alignment across jurisdictions.
  • Partner with the Head of HR - London to develop and execute the HR strategy, supporting business growth and firm culture.
  • Serve as a trusted advisor to partners and leaders, providing proactive HR guidance and insight.
  • Support recruitment efforts in collaboration with the London-based recruitment team.
  • Manage the full employee lifecycle locally, including onboarding, engagement, retention, and offboarding.
  • Drive the performance management process, promoting continuous feedback, coaching, and professional development.
  • Analyse performance review outcomes, identify key themes, and inform talent and development strategies.
  • Partner with the Learning & Development team to identify and deliver training initiatives that enhance leadership capability and professional growth.
  • Design and implement recognition and engagement programs that strengthen the firm’s culture and reinforce career progression pathways.
  • Manage employee relations with professionalism and discretion, engaging external counsel as appropriate to ensure compliance and fairness.
  • Oversee benefits management and contribute to annual salary and bonus reviews, ensuring equity and alignment with firm policy.
  • Manage the relationship with the outsourced payroll provider to ensure accuracy, compliance, and timeliness.

Required Skills

  • 7+ years of experience in HR, ideally within a professional services or multinational environment.
  • Strong knowledge of Luxembourg and Belgian employment law and HR best practices.
  • Proven ability to partner with senior leadership and partners as a trusted HR advisor.
  • Experience in building and aligning HR strategies across multiple jurisdictions.
  • Skilled in performance management, employee relations, and HR project delivery.
  • Excellent interpersonal and communication skills, with fluency in English.
  • Demonstrated ability to balance hands-on HR operations with forward-looking strategic initiatives.
  • Collaborative mindset, adaptable, and comfortable working in a dynamic, evolving environment.
  • Understands the importance of client and Firm confidentiality and acts with discretion and diplomacy at all times.
  • Self-motivated and able to work independently or as part of a team.
  • Analytical and can use data to present information clearly.
  • Sound judgement.

Details

Salary and Benefits: Competitive

Equal Opportunities

Simpson Thacher is committed to ensuring that everyone can reach their full potential, irrespective of background, identity, or circumstance. We know that we are at our best when we bring together diverse experiences and perspectives. This is why we are focused on fostering a collegial environment which maximises collaboration, empowering every individual to thrive and succeed.

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