J.F. Brennan Co., Inc. products

We have provided construction services for more than 100 years for marine-based infrastructure. In 2022, we acquired Harbor Offshore, Inc. (HOI). HOI is known globally as the standard for maritime security protection and is the first company licensed by the US Navy to reproduce its waterside perimeter barrier system for commercial application. HOI`s experts joined our team, bringing their trademarked Harbor Offshore Barriers™ systems to our clients.

Brennan has revolutionized the capping industry with its newly patented Broadcast Capping System (BCS™). This system uses the principles of hydraulic transport to deliver clean sand and gravel to a distribution barge where it is rapidly dewatered and unobtrusively spread over the bottom of the waterway. Brennan’s capping system can accurately spread materials up to 3 inches in diameter, while achieving a homogenous thickness with even distribution.

Our PSB 600™ is the current standard anti-terrorist port security barrier system for commercial installation. It employs a continuous net capture system supported on a floating pontoon structure.

Our PSB 5500™ anti-terrorist system employs a continuous net capture system supported on a pontoon structure. This marine barrier system has the highest ultimate stopping energy (9.09M FT-LBF/12,337 kJ) and working stopping energy (5,500,000 FT-LBF/24.46 MN) of the Harbor Offshore Barriers’ anti-terrorism systems.

Our PSB-T is a maritime barrier security system the US Navy uses and is suitable for military and civilian use. It is designed to stop FIACC, BBIED, and multiple boat and swarm attacks, among others.