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    About Brennan

    Our mission is to create and execute innovative solutions to the world's most complex maritime, environmental, and infrastructure challenges. 

    We are a fourth-generation, family-owned, marine construction firm that specializes in environmental remediationdam construction, commercial dive, harbor management, and submarine cable services. Working closely with public and private owners of water-based infrastructure since 1919, Brennan operates throughout coastal and inland waterways nationwide, while maintaining a large fleet of marine equipment.

    For more than a century, we've worked with clients and engineering firms with high levels of integrity and professionalism. We understand that success is not only measured by our outcome, but also through the process by which our outcome is achieved.

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    Safety First

    At Brennan, safety comes first, no exceptions. Our world-class safety program is one of the most innovative and successful programs in the construction industry. From our safety-based observation program to our culture where the individual is empowered, we take safety very seriously and our statistics prove this.

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    Generic Hi Vis OUR CULTURE


    We are proud of the culture we have created. We function as a winning team in which each individual is provided the tools and support he or she needs to succeed. We have defined this culture as the “Brennan Way” and have detailed each core value so that it is understood and embraced in everything that we do.

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    Our Story

    Brennan has been around since 1919. From two brothers who left a small farm in Iowa, to a cutting edge construction, environmental, and marine transportation firm. Ours is a story worth learning!

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    Download our Corporate Brochure

    At Brennan, we believe we truly have a special culture in which the safety and well-being of our people is our primary focus. Developed and refined over the course of nearly 100 years, it is what makes Brennan a great place to work.  For more information on J.F. Brennan Company and Brennan Marine, download our Corporate Brochure here!

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