How many employees work at European Southern?

European Southern Observatory has 1,132 employees, according to Revelio Labs workforce intelligence data. The YoY growth rate is 4.2%.

Data source: Revelio Labs Coverage: Global workforce Latest update: September 2025

About European Southern

ESO, the European Southern Observatory, is the foremost intergovernmental astronomy organisation in Europe and the world's most productive astronomical observatory. ESO provides state-of-the-art research facilities to astronomers and is supported by 16 member-states along with the host state of Chile and with Australia as a Strategic Partner. ESO's main mission, laid down in the 1962 Convention, is to provide state-of-the-art research facilities to astronomers and astrophysicists, allowing them to conduct front-line science in the best conditions. By building and operating a suite of the world's most powerful ground-based astronomical telescopes enabling important scientific discoveries, ESO offers numerous possibilities for technology spin-off and transfer, together with high technology contract opportunities and is a dramatic showcase for European industry. Whilst the Headquarters (comprising the scientific, technical and administrative centre of the organisation) are located in Garching near Munich, Germany, ESO operates, in addition to the Santiago Centre, three unique observing sites in Chile: La Silla, Paranal and Chajnantor.

As of September 2025

European Southern
workforce metrics

Headcount

1.1k

Avg. Salary

$48k

Tenure

8.1yr

Growth Rate

4.2%

Hiring Rate

Attrition Rate

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Employee Headcount

Interactive chart of European Southern annual worldwide employee count from 2023 to 2025.

  • European Southern total number of employees in 2025 was 1,113.306, a 4.2% increase from 2024.
  • European Southern total number of employees in 2024 was 1,075.988, a 3.7% increase from 2023.
  • European Southern total number of employees in 2023 was 1,039.213, a 1.7% increase from 2022.

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Employee Geographic Breakdown

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Employee Role Breakdown

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Employee Compensation

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Active Job Postings

Interactive chart of European Southern annual active job postings from 2023 to 2025.

  • European Southern active job postings in 2025 was 10, a 66.7% increase from 2024.
  • European Southern active job postings in 2024 was 8, a 11.8% decline from 2023.
  • European Southern active job postings in 2023 was 9, a 76.9% increase from 2022.

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Employee Sentiment

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