Proven Waterside Protection for Critical Marine Infrastructure
Brennan provides fixed, floating, and custom maritime security barrier systems that protect critical water assets from vessel-based threats, unauthorized access, and harsh marine conditions.
As the exclusive supplier of Harbor Offshore Barriers™, Brennan delivers the global standard for maritime security and serves as a service provider for the US Navy’s floating protection program.
Protecting Critical Assets From Waterborne Threats Maritime Security Barrier Services
Facilities located along navigable waterways face unique security challenges. Fast inshore attack craft, multiple boat attacks, explosive devices, underwater penetration, high-speed intruders, debris, waves, corrosion, and water-level fluctuations all create risks that require specialized protection.
Brennan’s maritime security barrier systems are engineered for those environments.
Through the acquisition of Harbor Offshore, Inc., Brennan expanded its marine security capabilities and brought Harbor Offshore Barriers™ into its service portfolio. Harbor Offshore is known globally for maritime security protection and was the first company licensed by the US Navy to reproduce its waterside perimeter barrier system for commercial application.
Fixed & Floating Barrier Systems Designed for Demanding Marine Environments Areas of Focus
Brennan provides fixed and floating maritime security barrier systems that protect critical waterside assets from vessel-based threats, unauthorized access, and harsh marine conditions.
Fixed & Floating Barrier Systems Designed for Demanding Marine Environments Maritime Security Barrier Systems
Brennan provides customized maritime security barrier solutions based on each site’s security needs, environmental conditions, infrastructure layout, operating requirements, and risk profile.
We design and fabricate our barriers to withstand harsh marine environments. Built with high-density, high-quality materials, including HDPE for UV resistance, these systems are engineered for long service life and reliable waterside protection. Our patented, rigorously tested systems are measured and confirmed, with barriers lasting more than 20 years.
Key Benefits
- Fixed and floating barrier system options
- Custom designs for site-specific security needs
- Protection against vessel-based threats
- Systems built for corrosion, debris, waves, and water-level fluctuations
- Durable materials designed for harsh marine environments
- Low-maintenance barrier options
- Long-term waterside perimeter protection
- Installation support from an experienced marine construction contractor
- Integration with critical infrastructure security planning
The Global Standard for Maritime Security Harbor Offshore Barriers™
Harbor Offshore Barriers™ are patented maritime security systems designed to protect critical assets from a range of waterborne threats. These systems can be customized during the design phase to meet the security, environmental, and operational requirements of each site.
Brennan works with clients to understand the threat profile, site conditions, marine environment, access needs, and long-term maintenance considerations before recommending a fixed or floating barrier solution.
Designed to Protect Against
- Fast inshore attack crafts
- Multiple boat and swarm attacks
- Boat-borne improvised explosive devices
- Underwater penetration
- High-speed intruders
- Unauthorized vessel access
- Waterborne threats before, during, and after impact
Permanent Protection for High-Risk Waterside Assets Fixed Security Barrier Systems
Brennan’s Fixed Security Barrier systems are designed for permanent installation and long-term protection in high-risk marine environments. These systems are built to stop a boat’s progress quickly while withstanding additional impacts, including second or third swarm attacks.
Fixed barrier systems are especially valuable for sites that require a durable perimeter security solution with low maintenance needs and strong attack resistance.
Key Applications
- Nuclear power plants
- Hydropower plants
- LNG, oil production, and transport facilities
- Desalination plants
- Dams and water-control structures
- Military facilities and installations
- Chemical plants
- Bridges
- Ports and shipyards
Flexible Waterside Protection for Ports, Facilities, and Critical Assets Floating Port Security Barrier Systems
Brennan’s floating port security barrier systems provide waterside protection against unwanted vessels, attacks, and intruders. These systems are designed for marine environments where security must work with changing water levels, waves, vessel operations, and facility access needs.
Brennan offers multiple Harbor Offshore Barrier system options, including the PSB 600™, PSB-T™, and PSB 5500™ systems. Brennan’s current page identifies the PSB 600™ as the current standard anti-terrorist port security barrier system for commercial installation, the PSB-T™ as a system used by the US Navy and suitable for military and civilian use, and the PSB 5500™ as the highest stopping-energy system in Harbor Offshore’s anti-terrorism lineup
Key Capabilities
- Floating waterside perimeter protection
- Continuous net capture systems
- Pontoon-supported barrier structures
- Protection against FIAC, BBIED, and swarm attacks
- Military and civilian applications
- Commercial port security applications
- Critical energy asset protection
- Site-specific barrier design and installation
Security Solutions for High-Value Waterside Facilities Protecting Critical Energy Assets & Infrastructure
Energy infrastructure is often located directly along waterways, making waterside security essential. Brennan helps protect critical energy assets with fixed and floating maritime security barrier systems built to resist harsh marine conditions and waterborne threats.
Energy & Marine Infrastructure Applications
- Desalination plants
- Hydropower plants
- Liquefied natural gas facilities
- Oil production and transport facilities
- Nuclear power plants
- Dams and hydropower facilities
- Chemical plants
- Ports and marine terminals
- Military installations
- Bridges and transportation infrastructure
Built Around Your Site, Threat Profile, and Operating Needs Custom Design & Installation
Every facility has different security requirements. Brennan’s team openly collaborates with clients and engineers during the design phase to develop a barrier solution that aligns with the site’s physical layout, environmental conditions, operational needs, access points, water levels, wave conditions, and security objectives.
Because Brennan is also a marine construction contractor, our team understands what it takes to install, maintain, and support these systems in real-world marine environments.
Project Support Can Include
- Site-specific barrier design support
- Fixed and floating system recommendations
- Marine construction installation support
- Barrier anchoring and mooring
- Access and gate considerations
- Environmental and operational planning
- Maintenance planning
- Repair and replacement support
- Coordination with owners, engineers, and security stakeholders
Patented, Rigorously Tested Maritime Protection Technology With Our Maritime Security Experts Sensitive Project Information
Because maritime security barrier projects involve sensitive facility details, site-specific vulnerabilities, and proprietary system information, Brennan encourages clients to connect with our team directly for specifications, technical details, and project planning support.
Whether your facility needs fixed barriers, floating port security barriers, critical energy infrastructure protection, or a custom waterside security solution, Brennan has the technology, people, and marine construction experience to help.
Proven Protection Backed By Marine Construction Experience Why Brennan for Maritime Security Barriers?
Maritime security barriers must do more than look secure. They perform in harsh marine environments, integrate with facility operations, withstand real threats, and support long-term protection.
Brennan brings together patented and tested technology, marine construction experience, waterside infrastructure knowledge, and field execution capability. That combination gives clients a partner that understands both security performance and the realities of working in and around the water.
What Sets Brennan Apart
- Exclusive supplier of Harbor Offshore Barriers™
- Award-winning safety performance in safety-critical environments
- Transparent project communication from design through closeout
- Experience protecting energy, defense, transportation, port, industrial, and public infrastructure assets all under one team
- Fixed, floating, and custom barrier system options
- Proven innovative problem solving to keep projects moving
Total Quality Management Across the Organization
- ISO 9001 (Quality Management Systems)
- ISO 14001 (Environmental Management)
- ISO 45001 (Occupational Health and Safety Management)
- ASME NQA-1 (2022), 10 CFR 50 Appendix B, and 10 CFR Part 21
