M&A Deal Summary

GZA GeoEnvironmental Acquires Siefert Associates

On September 2, 2025, GZA GeoEnvironmental acquired engineering company Siefert Associates

Acquisition Highlights
  • This is GZA GeoEnvironmental’s 4th transaction in the Engineering sector.
  • This is GZA GeoEnvironmental’s 10th transaction in the United States.
  • This is GZA GeoEnvironmental’s 3rd transaction in Connecticut.

M&A Deal Summary

Date 2025-09-02
Target Siefert Associates
Sector Engineering
Buyer(s) GZA GeoEnvironmental
Deal Type Add-on Acquisition

Target

Siefert Associates

Watertown, Connecticut, United States
Siefert Associates is a national construction engineering firm with offices in Connecticut, New York, and New Jersey. Siefert Associates was founded in 2000 and is based in Watertown, Connecticut.

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Buyer(S) 1

Buyer

GZA GeoEnvironmental

Norwood, Massachusetts, United States

Category Company
Founded 1964
Sector Business Services
DESCRIPTION

GZA GeoEnvironmental, Inc. is a provider of consulting, engineering, and information management services, along with a host of complementary support services, to public and private clients throughout the United States.


DEAL STATS #
Overall 10 of 10
Sector: Engineering M&A 4 of 4
Type: Add-on Acquisition M&A Deals 10 of 10
State: Connecticut M&A 3 of 3
Country: United States M&A 10 of 10
Year: 2025 M&A 1 of 1
PREVIOUS DEAL
DATE TARGET DEAL TYPE VALUE
2023-05-01 Glorieta Geoscience

Santa Fe, New Mexico, United States

Glorieta Geoscience is a provider of professional consulting services in groundwater development, water rights, agricultural science, litigation support, and environmental science throughout the Western United States. GGI serves federal, state, and municipal entities, tribal governments, private corporations, and individuals and has extensive experience in addressing water resource and environmental projects in New Mexico, Arizona, California, Colorado, Nevada, Texas, and Washington. Its specialty services include geomorphology, dairy environmental science, fire-threatened water supplies, post-fire watershed mitigation, hydrogeologic research, and compliance with the full range of federal and state water-related statutes and regulations. Glorieta Geoscience was formed in 1979 and is based in Santa Fe, New Mexico.

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