**The big picture:** Marsh & McLennan (now Marsh) reported $27 billion in 2025 revenue with over 95,000 colleagues globally, driven by aggressive acquisition strategies and a significant international presence. **Why it matters:** The firm's substantial workforce and continuous M&A activity highlight key trends in professional services, impacting talent integration, global HR operations, and competitive landscapes for staffing and consulting firms. **Between the lines:** - Marsh completed 102 acquisitions from 2021-2025, including 20 in 2025 alone, demonstrating a rapid growth-by-acquisition model. - Approximately 51% of its 2025 revenue was generated outside the U.S., underscoring its global workforce footprint. - Mercer, a key segment, rebranded its Career business to "Workforce and Rewards," signaling a focus on talent management and compensation. **Staffing & HR impact:** Marsh's acquisition-heavy strategy necessitates robust talent integration and HR due diligence, influencing recruiter mobility and the demand for specialized HR professionals. The rebranding of Mercer's Career segment to "Workforce and Rewards" reflects an evolving focus on comprehensive talent solutions. **The bottom line:** Marsh's continued expansion and strategic workforce adjustments will shape future talent acquisition and management practices in the professional services sector.