Billionaire Profile
Dennis Washington
Global Rank
#469

Image: FelixRo | CC BY 3.0 | via Wikimedia Commons

Dennis Washington

CEO, Construction
UNITED STATES
Real-Time Net Worth
$7.795B
Estimated based on Construction stock value as of March 6, 2026
0% (24h)
Age
91
Source
Construction, mining
Industry
Construction & Engineering
Citizenship
UNITED STATES

Biography

Dennis Washington, born in 1934, is an American billionaire industrialist known for his success in construction, mining, and marine transportation. His journey began with a construction company, Washington Construction, which he founded in 1964 with a modest loan. Over the years, Washington diversified his holdings, establishing The Washington Companies, which includes interests in mining, railroads, marine services, and aviation. Ranked among the world's wealthiest individuals, Washington has a net worth of $6.1 billion as of 2020. His career is marked by strategic acquisitions and a commitment to philanthropy through the Dennis and Phyllis Washington Foundation.

Fact Checked
Verified by Editorial Team
Live Data
Updated 3/6/2026

Wealth Over Time

In-Depth Profile

Early Life

Dennis Washington was born in Spokane, Washington, in 1934. He grew up in the Pacific Northwest, including Spokane, Bremerton, and Missoula, Montana. He experienced his parents' divorce at a young age. This motivated him to provide a stable family environment for his own family.

Rise to Success

After high school, he worked in construction in Alaska and Montana. Washington began his business career at age 30 in 1964, with a $30,000 loan and a single bulldozer. He created Washington Construction, which worked primarily on highway contracts, and by 1969 was the largest contractor in Montana. In the 1970s he moved into mining and dam construction. In 1986 he acquired a copper and molybdenum mine at Butte, Montana. He reopened the mine and it became a profitable operation. This success helped him diversify into railroads, marine services, coastal shipping, aviation and real estate.

Key Business Strategies

Washington's business strategy involved identifying opportunities where others didn't, taking calculated risks, and a focus on profitable ventures. He diversified his investments, including acquiring the copper and molybdenum mine in Butte, Montana. In 1996 Washington Construction merged with Morrison-Knudsen Corporation.

Philanthropy

Dennis and his wife, Phyllis, established the Dennis and Phyllis Washington Foundation in 1988. It focuses on education, health and human services, community service, and arts and culture. The couple's core values are defined as “integrity, compassion, courage, vision, and perseverance.”

Career Milestones

1964

Founded Washington Construction

Started his business with a $30,000 loan and a single bulldozer.

1969

Largest Contractor in Montana

Washington Construction became the largest contractor in Montana.

1986

Acquired Copper and Molybdenum Mine

Acquired a copper and molybdenum mine in Butte, Montana, which became a profitable operation.

1996

Acquired Morrison-Knudsen Corporation

Led to the formation of Washington Group International.

Philanthropy & Social Impact

Philanthropy

Dennis and Phyllis Washington Foundation

Undisclosed

Focuses on education, health and human services, community service, and arts and culture.

Business Philosophy & Leadership

Notable Quotes

"People always ask me for my secret. There isn't one. You've just got to keep a level head and stay away from greed. I just think in my life I relied on my instincts and had good intuition, and things just kind of fell into place."

Leadership Principles

Vision

The ability to see opportunities where others cannot and the drive to take risks and aggressively pursue them.

Teamwork

Acknowledges teamwork and people with a passion for their work

Controversies & Challenges

1998

Mining Interests Controversy

Held mining interests in Montana, which he sold or leased to a group of three businessmen who were convicted in an offshore investment scam that cheated investors.