Who we are
We are a well-established and growing employee-owned general contractor that operates throughout the United States. We have a strong track record of performance in bridge and heavy highway construction with a portfolio of work that includes highly visible and complex projects for Class 1, 2, 3 and commuter rail owners, state and local government agencies, and the Army Corps of Engineers, among many others.
We operate in a sweet spot in the construction industry—the capabilities and equipment of a large contractor combined with the expertise and attention to detail of a niche builder. Our agility and company culture reflect our humble, family-owned beginnings, while our reach and self-perform capabilities give us the ability to tackle large-scale construction projects.
We have built a strong reputation as problem solvers. This is a product of empowering our workforce not just to make detailed plans, but also to make the situation adjustments required by the nature of the complicated and complex jobs we take on.
Our approach creates a solid partnership between contractor and owner that ensures high-quality work, completed on time and within budget.
Our company founded as J.T. Schless and Company by Jack Schless, a former engineer with Holabird & Root.
The company completes construction of the Sacred Heart Academy in Lisle, Illinois, and the Tivoli Hotel and Theatre Complex in Downers Grove, Illinois; both landmarks today.
The company incorporates as The Schless Construction Company.
The company constructs the Merrie England Village for the New York World's Fair.
The company plays a pivotal role in development and construction of a key inland shipyard in Seneca, Illinois, to support the war effort to replace ships lost in the Pearl Harbor attack.
The company takes over operation of the Dachel Carter Shipbuilding facility through the end of the war, at the request of the U.S. Navy.
Robert M. Schless assumes control of the company after the death of his father, founder Jack Schless.
The company continues to grow, expanding work to include commercial buildings, roads, bridges and sewage treatment plants.
Schless Construction a primary contractor in construction of Fermilab (Fermi National Accelerator Laboratory), originally named the National Accelerator Laboratory, commissioned in 1967.
The Schless Construction Company reorganizes and incorporates as Illinois Constructors Corp.
1980s/90s/2000s—The company completes major construction projects in the Chicago area, including Dan Ryan expressway reconstruction, IDOT bridge work, Mississippi and Illinois River lock shutdowns/repairs for U.S. Army Corps of Engineers, Lake Michigan shoreline revetment reconstruction at Montrose Harbor, Des Plaines River bascule bridge work and many more.
John Mackanin appointed President of the firm.
2003–Present—Illinois Constructors pursues and achieves steady, disciplined, manageable growth.
Mackanin oversees purchase of the majority of the firm through an Employee Stock Ownership Program (ESOP).
Illinois Constructors Corp. changes its name to ICC, reflecting its continued growth and focus from a regional to a national player in heavy construction for public and private sector clients.