How many employees work at Iron Mountain?
Iron Mountain, Inc. has 27,521 employees, according to Revelio Labs workforce intelligence data. The YoY growth rate is -1.1%.
Data source: Revelio Labs Coverage: Global workforce Latest update: December 2025
About Iron Mountain
For over 70 years, Iron Mountain Incorporated (NYSE: IRM) has been your strategic partner to care for your information and assets. A global leader in storage and information management services and trusted by more than 225,000 organizations around the world, including 95% of the Fortune 1000, we protect, unlock, and extend the value of your work—whatever it is, wherever it is, however it’s stored. We create the framework necessary to bridge the gaps between paper, digital, media, and physical data and extract value along its lifecycle, helping to build your organizational resilience. And all this with a commitment to sustainability at our core. Our relationship is a true partnership where you trust us not only to preserve institutional knowledge and enhance efficiency, security, and access but to make your work mean more. Because in that work is the power to not only accelerate your business, but elevate it. Elevate the power of your work.
As of December 2025
Iron Mountain
workforce metrics
Headcount
27.5k
Avg. Salary
$48.6k
Tenure
4.8yr
Growth Rate
-1.1%
Hiring Rate
Attrition Rate
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Employee Headcount
Interactive chart of Iron Mountain annual worldwide employee count from 2023 to 2025.
- Iron Mountain total number of employees in 2025 was 27,522, a 1.1% decline from 2024.
- Iron Mountain total number of employees in 2024 was 27,831, a 2.2% increase from 2023.
- Iron Mountain total number of employees in 2023 was 27,221, a 2.6% increase from 2022.
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Employee Geographic Breakdown
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Active Job Postings
Interactive chart of Iron Mountain annual active job postings from 2023 to 2025.
- Iron Mountain active job postings in 2025 was 1,720, a 12.0% increase from 2024.
- Iron Mountain active job postings in 2024 was 1,526, a 26.5% increase from 2023.
- Iron Mountain active job postings in 2023 was 1,169, a 43.8% decline from 2022.
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Employee Sentiment
Sentiment Topics
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