Mercer is a global consulting firm based in the United States that provides human resources consulting, investment advice, and related services to clients in over 130 countries. The company was founded in 1937 by William M. Mercer and has its headquarters in New York City.

Mercer operates in four main business segments: Health, Wealth, Career, and Investments. The Health segment focuses on advising clients on employee benefits and healthcare programs. The Wealth segment offers pension and investment consulting services to help clients manage their financial assets.

The Career segment provides talent management and executive search services to help clients attract and retain top talent. The Investments segment advises institutional investors on investment strategy and risk management. On a global scale, Mercer has a strong presence in various regions and countries.

It has subsidiaries and offices in major cities around the world, including London, Tokyo, Sydney, and Dubai. The company also has numerous joint ventures and partnerships with organizations in different industries to enhance its service offerings and geographic reach. Mercer is one of the leading companies in its industry and has a significant market position globally.

It competes with other major consulting firms such as Willis Towers Watson, Aon, and Deloitte. In terms of global sales, Mercer generates billions of dollars in annual revenue, making it a major player in the consulting industry. Over the years, Mercer has achieved several major milestones and changes in its strategy.

In 2002, the company became a subsidiary of Marsh & McLennan Companies, a global professional services firm. This acquisition allowed Mercer to expand its capabilities and global reach. In recent years, Mercer has adapted to the changing market conditions by focusing on digital transformation and offering innovative solutions to its clients.

The company has introduced new technologies and tools to enhance its consulting services and provide data-driven insights to clients. Currently, Mercer continues to be at the forefront of the consulting industry, helping organizations navigate challenges and improve their human capital strategies. It remains a trusted advisor to many of the world's leading companies, providing them with comprehensive solutions for their HR and investment needs