Solving Complex Challenges Above & Below the Waterline
Brennan helps clients and engineering partners solve demanding marine, environmental, and infrastructure challenges with the people, equipment, safety culture, and expertise to execute with precision.
Marine Construction & Environmental Services Built for Complex Work Est. 1919
Brennan is a fourth-generation, family-owned marine construction company that designs and delivers solutions for complex maritime, environmental, and infrastructure challenges above, along, and below the waterline.
From marine construction and environmental remediation to commercial diving, dam construction, harbor services, and energy-sector support, public and private owners of water-based infrastructure trust Brennan to deliver safe, honest, practical, and technically sound solutions across coastal and inland waterways nationwide.
Our work is defined not only by the finished project, but by how safely we work, how clearly we communicate, how carefully we plan, and how confidently we help clients move through complex conditions.
Ready To Discuss Your Project?
Connect with our team to learn how Brennan can support your next infrastructure challenge.
Specialized Services for Water-Based Infrastructure What We Do
A Safety Program Built for Safety-Critical Work
Safety First. Quality Always.
Brennan’s work takes place in some of the most complicated environments in the construction industry. That is why safety is built into our organizational structure; every plan, every crew, and every project. We combine rigorous safety practices and plan with environmental stewardship, and quality-focused execution to protect our people, our clients, and the ecosystems where we work.
Built by People. Driven by Trust. Job Openings
At Brennan, our people are our top priority. Together, we support complex projects, solve difficult problems, and help shape the future of marine infrastructure and environmental services.
Focusing on strong, open communication with clients and team members, we take pride in building a culture where people are supported and empowered to grow.
We work on meaningful projects from coast to coast, strengthening infrastructure and the environment all while collaborating with talented professionals who care deeply about their work and each other.
Join our team! You’ll find opportunities to make an impact, contribute new ideas, and build a rewarding career alongside people who are passionate about what they do.
Underwater Expertise for the Work Others Cannot See
Dive Construction & Inspection Services
Brennan’s commercial divers are trained to perform complex work in challenging underwater environments. Using advanced tools, proven safety practices, and modern inspection and imaging technologies, our divers support construction, repair, inspection, and maintenance projects in conditions that demand experience and control.
