Private company

Washington Group International

Former American engineering services company

Washington Group International was an American corporation which provided integrated engineering, construction, and management services to businesses and governments around the world. Based in Boise, Idaho, WGI had approximately 25,000 employees working in over 40 US states and more than 30 countries.2 Wikipedia text CC BY-SA 4.0

Last updated Oct 21, 2026.

Overview

1964Founded1

Washington Group International was an American corporation which provided integrated engineering, construction, and management services to businesses and governments around the world. Based in Boise, Idaho, WGI had approximately 25,000 employees working in over 40 US states and more than 30 countries.2

Corporate structure

Washington Group International sits at the top of its group. 3 entities, 2 countries on record. Switch between the flow chart and the network, and select any entity to see its details.

Built from subsidiaries, stakes and holdings from Wikidata (CC0); major holders from Schedules 13D and 13G. Each entity in the chart links to its source.

Subsidiaries and ownership

Subsidiaries

From Wikidata.1

Timeline

  1. 1964Founded Founded1

Sources

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

  1. 1
  2. 2