How many employees work at HII Mission?
HII Mission Technologies Corp. has 3,319 employees, according to Revelio Labs workforce intelligence data. The YoY growth rate is 3.5%.
Data source: Revelio Labs Coverage: Global workforce Latest update: September 2025
About HII Mission
Alion Science and Technology Corporation is an "employee-owned" technology solutions company delivering technical expertise and operational support to the United States Department of Defense, civilian government agencies and commercial customers. Based in Tysons Corner, Virginia, Alion has 3300 employees at major offices, customer sites and laboratories worldwideand utilizes subcontractors whenever possible to keep their costs down. It was established in 2002 when approximately 1600 employees purchased most of the assets of IIT Research Institute. One Alion product is the simulation software tool, Micro Saint Sharp.
As of September 2025
HII Mission
workforce metrics
Headcount
3.3k
Avg. Salary
$131.6k
Tenure
6.8yr
Growth Rate
3.5%
Hiring Rate
Attrition Rate
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Employee Headcount
Interactive chart of HII Mission annual worldwide employee count from 2023 to 2025.
- HII Mission total number of employees in 2025 was 3,290.459, a 3.5% increase from 2024.
- HII Mission total number of employees in 2024 was 3,172.014, a 1.4% increase from 2023.
- HII Mission total number of employees in 2023 was 3,125.812, a 1.8% decline from 2022.
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Employee Geographic Breakdown
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Active Job Postings
Interactive chart of HII Mission annual active job postings from 2023 to 2025.
- HII Mission active job postings in 2025 was 89, a 9.6% decline from 2024.
- HII Mission active job postings in 2024 was 87, a 69.8% increase from 2023.
- HII Mission active job postings in 2023 was 42, a 66.7% increase from 2022.
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Employee Sentiment
Sentiment Topics
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