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Private company

MACTEC

Logo: epmayer, Attribution, via Wikimedia Commons3

MACTEC was among the largest engineering design companies in the United States. The company provided engineering, environmental, and construction services to private- and public-sector clients. MACTEC was based in Denver, Colorado until 2002, when they merged with LAW Engineering and the headquarters were moved to Alpharetta, Georgia.2 It was founded in 1975.1 Wikipedia text CC BY-SA 4.0

Last updated Oct 21, 2026.

Overview

1975Founded1

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MACTEC was among the largest engineering design companies in the United States. The company provided engineering, environmental, and construction services to private- and public-sector clients. MACTEC was based in Denver, Colorado until 2002, when they merged with LAW Engineering and the headquarters were moved to Alpharetta, Georgia. At that time they employed 3100 staff in 80 locations, with capability in more than 50 scientific and engineering disciplines. The company consisted primarily of two primary operating entities.2

How it started

History

Management Analysis Company (later changed to MACTEC) was founded in 1975 to serve the electric utility and nuclear power industries, expanding during the 1980s into nuclear site remediation. In 1997, MACTEC began strategic acquisition of companies that provided design/build and environmental services.

Mergers and acquisitions

Acquisition and merger of Harding Lawson Associates and Environmental Science & Engineering (forming Harding ESE) added manufacturing, chemical, transportation, and telecommunications.

Acquisition of Pacific Environmental Services Inc. added value engineering, occupational health and safety, water and wastewater management, and pollution prevention.

Merger with Law Engineering and Environmental Services doubled MACTEC size and revenue, and added environmental and geotechnical engineering, facility management, construction quality assurance, and expanded geographic coverage.

From Wikipedia’s article on MACTEC, shared under CC BY-SA 4.0.2

Subsidiaries and ownership

Owners

From Wikidata.1

Timeline

  1. 1975Founded Founded1

Sources

The numbers on this page point here. Each one links to the record it came from.

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