美世是威达信集团（Marsh & McLennan Companies，NYSE：MMC）的全资子公司。美世成立于1937年，总部位于美国，是全球领先的人才、健康、养老和投资咨询机构。美世致力于协助客户在全球范围不断提升其最关键的资产——其员工的健康、财富和绩效。威达信集团是一家全球性的提供风险、战略与人力资本咨询和解决方案专业服务的国际集团公司。美世自20世纪70年代开始进入大中华区。1995年，美世在中国设立了第一家办事处，目前美世在北京、上海、广州、深圳、南京和大连均设有办事机构。

MERCER (Marsh & McLennan Companies，NTSE：MMC), founded in 1937 and headquartered in America, is a global consulting leader in talent, health, retirement, and investments. Mercer helps clients around the world advance the health, wealth, and performance of their most vital asset – their people. Mercer's 23,000 employees are based in more than 40 countries, and we operate in more than 130 countries. Mercer is a wholly owned subsidiary of Marsh & McLennan Companies (NYSE: MMC), a global team of professional services companies offering clients advice and solutions in the areas of risk, strategy, and human capital. Mercer entered Chinese market in 1995, and currently it has 6 branches in Beijing, Shanghai, Guangzhou, Shenzhen, Nanjing and Dalian in Mainland China.