
Marsh is a global professional services firm headquartered in New York, operating through four main businesses: Marsh (insurance brokerage and risk management), Guy Carpenter (reinsurance), Mercer (health, wealth, and career consulting), and Oliver Wyman (management consulting). With roots dating to 1871, the company serves clients in over 130 countries, helping organizations navigate risk, strategy, and people-related challenges. It employs more than 85,000 colleagues worldwide and is a Fortune 500 company, recognized as a leader in commercial insurance brokerage and human capital consulting.