Submarine Cable Services
Areas of Focus
Cable Installation and Burial
At Brennan, our experienced team delivers end-to-end expertise for every phase of subaqueous cable installation and burial. We prioritize trust, collaboration, and transparent communication with our clients, engineers, suppliers, contractors, and regulators to ensure every project runs smoothly, safely, and on schedule.
Quality Control
As an ISO 9001:2015, ISO 14001:2015, and ISO 45001:2018 certified company, Brennan maintains the highest standards of quality, safety, and environmental responsibility. Using advanced technologies, from Remotely Operated Vehicles (ROVs) to IMCA-compliant commercial divers, we provide complete inspection and monitoring capabilities both above and below the waterline.
Equipment
We invest heavily in our equipment to ensure our teams always have the right tools for the job. Every asset is selected for efficiency, reliability, and precision, including our hydro plow systems, vessels, barges, and cable-handling towers. This focus on readiness and performance allows us to execute even the most complex installations with confidence.
Innovation
Brennan remains at the forefront of marine innovation, continuously refining our methods to deliver safer, smarter, and more efficient results. Our engineers and field teams design customized tools and processes tailored to each project, optimizing performance while reducing time and cost.
Hydrographic Surveyors
Home to one of the largest hydrographic survey teams in the nation, Brennan utilizes multi-beam and single-beam echo sounders, side-scan sonar, and sector-scan sonar systems to map and analyze underwater environments. From pre-lay route surveys to real-time quality assurance, our experts identify potential obstacles early and mitigate risk throughout installation.
Environmental Stewardship
With decades of experience operating in rivers, lakes, coastal areas, and wetlands, Brennan is committed to completing every project with minimal environmental impact. Our proven ability to work within sensitive ecosystems and complex regulatory frameworks has earned us national recognition for executing some of the largest water-based environmental projects in North America.
Route Preparation and Pre‐Lay Grapnel Runs
Before cable installation begins, Brennan conducts comprehensive above- and below-water route preparation to ensure a clear, safe, and efficient path. Our team identifies and removes boulders, debris, sand waves, wire ropes, and other obstructions, using the right tools and equipment for each condition. With a seamless, data-driven approach to inspection and clearance, we deliver precise route preparation that minimizes risk and sets every cable project up for long-term success.
Civil and Site Work
Brennan delivers comprehensive, turnkey shore-landing services, including trenching, cable pull-in, and termination vault installation. Our team brings deep expertise in pile driving, deep foundations, and both precast and cast-in-place concrete construction. With a versatile fleet of specialty marine and land-based equipment, we can efficiently access and operate in remote or hard-to-reach locations, ensuring safe, high-quality results in even the most challenging environments.
Staging and Support Locations
With strategically located facilities across the United States, Brennan provides efficient staging and logistics support for cable projects nationwide. Through our company-managed equipment yards and trusted industry partnerships, we can establish and operate staging areas virtually anywhere in the country. From cable storage and handling to full project execution, Brennan serves as your complete nearshore cabling partner, ensuring seamless coordination from shore to seabed.
Pull-In Support
Brennan provides expert cable export pull-in services, managing every stage of the process with precision and care. Our team handles horizontal directional drilling (HDD) installation, cable alignment and connections, tension control, and quality assurance to ensure a smooth, reliable pull-in operation from start to finish.
Environmental Preservation
At Brennan, environmental stewardship is a core value that guides every project we undertake. Our proven expertise in environmental remediation and restoration allows us to deliver sustainable solutions that protect natural resources while providing added value for clients with environmental preservation goals. Beyond preservation, our IMCA-compliant divers are experienced in:
- Coastal wetland restoration
- Eelgrass relocation
- Impacted sediment remediation
- Mollusk relocation
Post-Lay Cable Protection and Capping
Brennan provides a range of post-lay cable protection solutions designed to ensure long-term stability and safety. From rock placement to articulating block mat (ABM) installation, we deliver cost-effective, customized approaches tailored to the unique conditions of each project to protect critical infrastructure from environmental and operational impacts.
Our post-lay protection includes:
- Bend restrictors
- Fabric-formed cast‐in‐place ABM
- Guide tubes
- Precast ABM
- Rock placement
- Split-pipe cable protection
Cable Repair, Decommissioning, and Removal
Brennan provides comprehensive cable repair, decommissioning, and removal services tailored to each project’s unique requirements. As a full-service marine contractor with extensive above- and below-water capabilities, we deliver turnkey solutions that ensure safety, efficiency, and environmental compliance from start to finish.
