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About Us

Hennessey for over 40 years has been able to strive in providing quality, cost effective engineering designs in all aspects of civil and municipal engineering.  By providing quality designs, Hennessey has been able to build and maintain a strong array of clients, both in the public and private sector.

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    History

    The Company was established in 1971 as a civil engineering consulting firm by Timothy L. Hennessey, P.E.  Initially, the three-person firm set out to respond to the civil engineering needs of the Downriver area of Metropolitan Detroit.  Today, the company’s history of success is reflected by its growth, covering a service area that includes all of Southeast Michigan and an expanded array of services

  • Our Services

    Hennessey Engineering offers a range of services including Civil Engineering, Surveying and Mapping Services (GIS), Transportation Planning & Engineering, Wastewater Design Services, Water Distribution and Analysis, Storm Water Management, Park and Recreation Design, Architectural Design,  Field Observation & Testing Services, and Private Development Reviews

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