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There is no limit to engineering for the dreamers of dreams and for the architects of the future.


-Dixon O'Brien, Jr., 1972

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OBA History
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O'Brien and Associates, Inc. began as a small consulting firm in 1972 in Arlington Heights, Illinois.  Throughout the 1970's, the company grew to become a recognized Civil Engineering firm throughout Chicagoland. 

In the early 1980's, OBA was an essential firm for the growth of both Chicago and surrounding suburbs in Soil Testing, Civil Engineering, and the Soil Mechanics for industry and commercial structures.

In 1984, OBA was provided the designation of Woman Owned Business (WBE) in both the State of Illinois and the City of Chicago. 

Throughout the 1990's and 2000's, OBA expanded the Civil Engineering into Geotechnical Engineering and Geotechnics.  The combination of Soil Mechanics and Geotechnical Engineering has continued to enhance the recognition and professionalism of OBA.

In present day, OBA continues to be an active and recognized Civil and Geotechnical firm throughout Illinois, Wisconsin, and Indiana.