How many employees work at John Sisk & Son?
John Sisk & Son (Europe) Ltd. has 3,867 employees, according to Revelio Labs workforce intelligence data. The YoY growth rate is -2.0%.
Data source: Revelio Labs Coverage: Global workforce Latest update: September 2025
About John Sisk & Son
John Sisk & Son Ltd (“Sisk”) is an innovative, international, engineering and construction company. It is a progressive business with long term vision, operating since 1859. Sisk is Ireland’s No1 provider of construction services with extensive operations across Ireland, the United Kingdom and mainland Europe.
As of September 2025
John Sisk & Son
workforce metrics
Headcount
3.9k
Avg. Salary
$75.2k
Tenure
4.3yr
Growth Rate
-2.0%
Hiring Rate
Attrition Rate
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Employee Headcount
Interactive chart of John Sisk & Son annual worldwide employee count from 2023 to 2025.
- John Sisk & Son total number of employees in 2025 was 3,944.978, a 2.0% decline from 2024.
- John Sisk & Son total number of employees in 2024 was 3,840.332, a 0.1% increase from 2023.
- John Sisk & Son total number of employees in 2023 was 3,843.115, a 11.5% increase from 2022.
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Employee Geographic Breakdown
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Active Job Postings
Interactive chart of John Sisk & Son annual active job postings from 2023 to 2025.
- John Sisk & Son active job postings in 2025 was 219, a 85.2% decline from 2024.
- John Sisk & Son active job postings in 2024 was 546, a 73.0% increase from 2023.
- John Sisk & Son active job postings in 2023 was 254, a 20.9% increase from 2022.
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Employee Sentiment
Sentiment Topics
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