How many employees work at Space Telescope Science?

Space Telescope Science Institute has 866 employees, according to Revelio Labs workforce intelligence data. The YoY growth rate is -0.2%.

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

About Space Telescope Science

We are the Space Telescope Science Institute in Baltimore, Maryland, operated by the Association of Universities for Research in Astronomy. We help humanity explore the universe with advanced space telescopes and ever-growing data archives. Established in 1981, we have helped guide the most famous observatory in history, the Hubble Space Telescope. Since its launch in 1990, we have performed the science operations for Hubble. We also lead the science and mission operations for the James Webb Space Telescope (JWST), which launched on December 25, 2021. We will perform parts of the science operations for the Nancy Grace Roman Space Telescope, in formulation for launch in late 2026, and we are partners on several other NASA missions. Our staff conducts world-class scientific research; our Barbara A. Mikulski Archive for Space Telescopes (MAST) curates and disseminates data from over 20 astronomical missions; and we bring science to the world through internationally recognized news, education, and public outreach programs. We value our diverse workforce and civility in the workplace, and seek to be an example for others to follow. OUR STRATEGIC GOALS • Excel in the science operations of NASA's current and future astrophysics flagship missions. • Advance state-of-the-art astronomical research, archives, and tools for scientific discovery. • Make the world's astronomical information accessible to all. • Promote an inclusive, equitable workplace and cultivate a diverse, engaged workforce.

As of September 2025

Space Telescope Science
workforce metrics

Headcount

866

Avg. Salary

$111.5k

Tenure

6.8yr

Growth Rate

-0.2%

Hiring Rate

Attrition Rate

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Employee Headcount

Interactive chart of Space Telescope Science annual worldwide employee count from 2023 to 2025.

  • Space Telescope Science total number of employees in 2025 was 873.457, a 0.2% decline from 2024.
  • Space Telescope Science total number of employees in 2024 was 851.802, a 3.1% increase from 2023.
  • Space Telescope Science total number of employees in 2023 was 831.533, a 4.7% 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 Space Telescope Science annual active job postings from 2023 to 2025.

  • Space Telescope Science active job postings in 2025 was 71, a 44.8% increase from 2024.
  • Space Telescope Science active job postings in 2024 was 154, a 6.9% decline from 2023.
  • Space Telescope Science active job postings in 2023 was 165, a 15.1% decline from 2022.

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Employee Sentiment

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