Celebrating more than 100 years in business, we are excited to share our story and hope that you will find this site both educational and informative. We want to hear from you, so feel free to contact us with any questions or comments. We have more than 80 ADCI certified commercial divers on staff throughout the US that specialize in underwater construction.

Check out Brennan news, our "Between the Trees" Blog, company videos, downloadable assets, and more. We share our insight on hot topics, highlight our specialized projects, and even share some of the secrets to our success.

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About Us Report

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 remediation, dam construction, commercial dive, harbor management, and submarine cable services.

Careers Report

A team that strives to continuously grow and innovate, develops new skills, challenges ourselves, and performs the highest quality work in the safest manner. We are a family-owned company that values our employees as our greatest strength, and we constantly strive to make Brennan the best place to work for each and every one.

Environmental Report

Brennan offers flexible approaches and innovative solutions to successfully restore contaminated waterways and wetlands. Much of our portfolio is full of accomplishments that have surpassed remedial goals and raised industry standards. We do this by coordinating closely with all stakeholders and investing in the research and design of new and innovative tools.

Environmental Dredging Report

J.F. Brennan Company offers flexible approaches and innovative solutions to successfully restore contaminated waterways and wetlands. Much of our portfolio is full of accomplishments that have surpassed remedial goals and raised industry standards. We do this by coordinating closely with all stakeholders and investing in the research and design of new and innovative tools.

Samrath Raj

Mar 07, 2022

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Wonderful Experience. They are very professional. Thank you so much for the great service.

Donald Myers

Dec 25, 2020

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Couldn't get there to deliver by friday so they had a young man come in saturday morning to unload us. Very nice very professional great folks

David Raines

May 31, 2020

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I work with Brennan via B2B relationship, and they have always been nothing but professional, courteous and responsive. I wish more of the construction companies we engage handled themselves as well as Brennan does!

J F Brennan