Engineering for technical decisions that matter.
How we work
Most of our work begins before the answer exists – when a technical direction is still open and the right question hasn’t been fully formed. That’s where we start. It’s also where honest engineering judgment is worth the most.
From that understanding, we develop concepts grounded in evidence, testing assumptions, never proposing a direction before we’ve verified whether it holds. When the concept is sound, we build: prototypes, test rigs, physical models, working systems. And we carry the work through to confirmation: the data, the analysis, the clear recommendation you can act on.
Not every project runs the full distance. Some need a rigorous feasibility assessment and a clear go/no-go. Others need a prototype in the water. We go as far as the problem requires.
Marine renewables is where much of our deepest experience sits – wave energy converters, tidal systems, numerical modelling, tank testing, techno-economic analysis. But the engineering process travels. We’ve applied the same rigour to medical devices, wind technology, and product development, because the discipline of finding the right answer doesn’t change with the sector.
We are all engineers. The people who assess your challenge are the right people to work on it.
We have worked with…









































There are no account managers at 4c. The founders lead technical work on every project, and the team you speak to is the team that delivers.
We respond to every enquiry personally.
What are you working on?





