MACTEC Then
In 1975, MACTEC began providing services to the electric utility and nuclear power plant construction industries, and in the 1980s, expanded into nuclear site remediation. In 1997, MACTEC began a series of strategic acquisitions by purchasing companies that provided design/build and environmental services.

With the 2000 merger of Harding Lawson Associates Group Inc. and Environmental Science & Engineering Inc. (forming Harding ESE Inc.), MACTEC expanded into the oil & gas, mining, manufacturing, consumer products, chemical and pharmaceutical, aerospace, transportation, telecommunications and waste management industries.

In 2000, Pacific Environmental Services Inc. (PES) brought major DoD contracts and nationally recognized value engineering, occupational health and safety, water / wastewater management, and pollution prevention expertise to MACTEC. And most recently, the merger with Law Engineering and Environmental Services Inc. (LAW) in 2002 nearly doubled MACTEC’s size and revenues, and brought the company renowned geotechnical engineering, construction quality assurance, facilities engineering, and industrial risk management expertise while increasing the geographic coverage of environmental capabilities.

MACTEC Now
With broader geographic coverage and expanded capabilities, MACTEC is now a $492 million firm providing a full range of engineering consulting services to more than 7,000 clients worldwide. Operating with over 3,000 employees—including specialists in over 50 scientific and engineering disciplines—MACTEC has the resources to perform virtually any scope of work, regardless of location, size or complexity.

MACTEC Engineering and Consulting
Uniting the strengths of the former Harding ESE, PES, and LAW, MACTEC Engineering and Consulting (E&C) provides a wide variety of services including site development, planning and engineering design, construction phase services, environmental services and facilities operations and maintenance services. MACTEC E&C’s Federal Programs Division provides these same services, as well as large outsourcing contracts, tailored to meet the unique needs of U.S. government agencies, including DoD, EPA, NASA, Department of Energy, National Park Service and others.

With world-class expertise in a full range of engineering and science disciplines including environmental, facilities, civil, structural, and geotechnical engineering, MACTEC E&C provides innovative, efficient solutions tailored to our clients’ needs.

MACTEC Development
Formerly MACTEC Constructors, MACTEC Development performs decommissioning and demolition (D&D) of nuclear power plants, former nuclear weapons facilities, and other large construction projects. One of the very few U.S. organizations with the required regulatory and technical expertise to execute nuclear D&D projects, MACTEC Development’s capabilities encompass the entire D&D process, including removal of hazardous materials, remediation of contaminated soil, structural analysis of standing buildings, and demolition of such structures.