How many employees work at Marsh & McLennan?
Marsh & McLennan Cos., Inc. has 167,031 employees, according to Revelio Labs workforce intelligence data. The YoY growth rate is 2.6%.
Data source: Revelio Labs Coverage: Global workforce Latest update: September 2025
About Marsh & McLennan
Marsh McLennan (NYSE: MMC) is the world’s leading professional services firm in the areas of risk, strategy and people. The Company’s more than 85,000 colleagues advise clients in 130 countries. With annual revenue of over $20 billion, Marsh McLennan helps clients navigate an increasingly dynamic and complex environment through four market-leading businesses. Marsh provides data driven risk advisory services and insurance solutions to commercial and consumer clients. Guy Carpenter develops advanced risk, reinsurance and capital strategies that help clients grow profitably and pursue emerging opportunities. Mercer delivers advice and technology-driven solutions that help organizations redefine the world of work, reshape retirement and investment outcomes, and unlock health and wellbeing for a changing workforce. Oliver Wyman serves as a critical strategic, economic and brand advisor to private sector and governmental clients. Follow us on Twitter at @marshmclennan.
As of September 2025
Marsh & McLennan
workforce metrics
Headcount
167k
Avg. Salary
$83.4k
Tenure
5.4yr
Growth Rate
2.6%
Hiring Rate
Attrition Rate
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Employee Headcount
Interactive chart of Marsh & McLennan annual worldwide employee count from 2023 to 2025.
- Marsh & McLennan total number of employees in 2025 was 167,688.228, a 2.6% increase from 2024.
- Marsh & McLennan total number of employees in 2024 was 160,926.891, a 0.6% increase from 2023.
- Marsh & McLennan total number of employees in 2023 was 159,538.063, a 3.1% increase from 2022.
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Employee Geographic Breakdown
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Active Job Postings
Interactive chart of Marsh & McLennan annual active job postings from 2023 to 2025.
- Marsh & McLennan active job postings in 2025 was 37,015, a 32.6% increase from 2024.
- Marsh & McLennan active job postings in 2024 was 33,228, a 43.2% increase from 2023.
- Marsh & McLennan active job postings in 2023 was 21,416, a 24.3% increase from 2022.
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Employee Sentiment
Sentiment Topics
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