Largest Privately Held Companies

For Stanley Consultants, a global engineering firm focused on water, energy and transportation, last year marked the 100th year in business. 

This offered the company an opportunity to trace its history, starting as the small “Central States Engineering” firm in Muscatine in 1913 and transforming into a multidisciplinary, international force with 1,000 members (the company’s term for employees), now serving public and private clients worldwide.

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