Workboats Designed With Purpose
Our Expertise
Rockabill Marine Design was founded on a clear belief: good boats come from understanding how they are really used. Led by naval architect Ruairí Grimes, our team combines technical precision with operational insight, delivering vessels for offshore energy, aquaculture, autonomous operations, and specialist services.
We don’t chase awards or headlines. We design vessels that work — built to deliver performance where it matters most.
With experience in structural engineering, offshore project management, and regulatory consulting, we understand the full lifecycle of vessel delivery — from concept to launch.
Design Without Ego
We believe the best workboats are built from listening
not from chasing trends.
Our design process prioritises function, durability, and simplicity of operation. If something adds value, it stays. If it doesn't, it goes.
This approach has seen our vessels recognised across the industry, with award-winning designs like the Envirocat Eco 8.5 setting new standards for efficiency and sustainability.
Whether it's a custom-built mussel harvester, a 9m RIB, or a hydrogen-powered prototype, our focus remains on real-world results that last.
Supporting Innovation Across Sectors
Rockabill Marine Design is trusted by commercial operators, aquaculture firms, offshore wind contractors, and even yacht designers seeking engineering expertise.
We offer tailored vessel solutions across aquaculture, offshore wind, autonomous craft, and specialist government service craft. Whether you're launching a new venture or expanding an existing fleet, we bring the right mix of creativity, discipline, and delivery focus.