Last checked Jul 24, 2026
Environmental Science Associates (ESA)esassoc.comEnvironmental Science Associates (ESA) is not currently listed as private-equity-owned.
Ownership & Acquisition History
Environmental Science Associates (ESA) is not private-equity-owned; it states it is a 100% employee-owned environmental consulting firm (ESOP).
Notes
- ESA’s official About page describes Environmental Science Associates as a “100% employee-owned environmental consulting firm” and notes it was founded in 1969 in Foster City, California.
- ESA’s official History page provides the founders’ names (Paul Zigman, Richard Cole, Keith Kaulum) and the founding date (July 3, 1969), and also references the ESOP/employee-ownership history.
Sources
- About ESA
Environmental Science Associates (ESA) - Ownership status (100% employee-owned) and founding year/location (founded in 1969 in Foster City, California).
- History
Environmental Science Associates (ESA) - Founders (Paul Zigman, Richard Cole, Keith Kaulum) and founding date (July 3, 1969); employee-ownership/ESOP timeline context.
- https://ess.com/about-us/
Web search - Consulted by the research agent
- https://www.esa.int/Enabling_Support/Preparing_for_the_Future/Discovery_and_Preparation/About_us
Web search - Consulted by the research agent
- https://esaweb.org/about/
Web search - Consulted by the research agent
- https://en.wikipedia.org/wiki/Entomological_Society_of_America
Web search - Consulted by the research agent
- https://www.theesa.com/foundation/about/
Web search - Consulted by the research agent
- https://www.esportassociation.org/about-us
Web search - Consulted by the research agent
- https://en.wikipedia.org/wiki/Ecological_Society_of_America
Web search - Consulted by the research agent
- https://esahubble.org/about_us/
Web search - Consulted by the research agent
- https://www.esa.int/content/view/full/1243
Web search - Consulted by the research agent
- https://climate.esa.int/en/about-us-new/
Web search - Consulted by the research agent
Ownership FAQ
Is Environmental Science Associates (ESA) owned by private equity?
No. Environmental Science Associates (ESA) does not currently appear to be private-equity-owned.
Who owns Environmental Science Associates (ESA)?
100% employee-owned (employee stock ownership program / ESOP); independently owned (not controlled by a private equity sponsor).
When was Environmental Science Associates (ESA) last checked?
This page was last checked on Jul 24, 2026.