Washington Corporations
Administrative and Support ServicesMontana, United States51-200 Employees
Washington Corporations serves as the central administrative and services hub for The Washington Companies, a privately held group of independently operated firms led by Dennis R. Washington. The broader organization spans six sectors: rail transportation, marine transportation, construction and mining, heavy equipment sales, aviation technology, and real estate development, yet each company remains privately owned with its own management and board. The member companies operate across the United States, western Canada, and internationally, with Washington Corporations coordinating centralized services to support governance and shared operations. Based in Missoula, Montana, Washington Corporations provides professional services across information technology, tax management, human resources, legal, accounting, business development, communications, real estate management, aviation, travel, facilities and hospitality to its affiliated companies. It functions within the administrative and support services sector, enabling cross-company coordination and centralized administration for the group. A recent development within the Washington Companies network is the appointment of Heather Mattson as Chief Financial Officer for Washington Companies LLC, effective January 2, 2026.
1-888-653-2347 
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