ON POINT. ON TIME. ON BUDGET. Our engineers specialise in bespoke solutions for challenging water projects. Find out how Kaymac is leading innovation in marine and civil engineering.

Since 1976, we’ve worked to build our excellent reputation. Kaymac started out as a small team of dive operatives specialising in underwater problem-solving. Today we have multi-skilled teams in three locations, delivering engineering solutions above and below the water line. There’s an excellent reason why clients keep coming back to Kaymac. In fact, there are five:


At Kaymac, our greatest asset is our people. We’re proud to have a dedicated, long-term workforce who, between them, hold a vast knowledge base and are passionate about the work we deliver. From the Directors and project managers to admin, we all hold the same ethos: To deliver an exceptional quality service to the highest standard, a standard to which we are accustomed to.  


We have a strong can-do attitude; it’s in our culture, coupled with a firm focus on professional development and dedication to excellence.


 With an in-house team of civil and chartered civil engineers, we have the capability to devise and develop solutions that are bespoke and buildable. These solutions are then put to the test by our operations team, delivering sustainable turnkey and robust value engineering solutions for our clients. We are the one-stop shop for engineering challenges in and around water, starting every project with an open mind and applying our decades of experience, skills, and the latest technology.


On time, on budget, and beyond expectations. Kaymac is a marine contractor which is truly committed to excellence, valuing customer service and delivering results with care for our clients, end users, and wildlife.


We are audited and certified to ISO 1400 Environmental, ISO9001 Quality and ISO 45001 Health and Safety Management Systems, accredited to the relevant industry standards, and members of CECA and the ADC.  Our workforce of over 60 people is diverse and efficient; from project managers to civil engineers, confined space operatives and commercial divers, we have specialists for each aspect of the project, while ensuring we protect the environment where we work.


Kaymac are experienced, multi-disciplined specialist marine and civil engineering contractors

From our company's roots as commercial diving contractors right through to rail engineering and civil engineering for coastal and inland waterways, Kaymac's comprehensive list of services continues to expand to meet the requirements of clients nationwide. We provide pioneering marine and civil engineering solutions to meet the needs of our customers: Engineering innovation above and below the waterline.

Capabilities include:

Kaymac provided an excellent and reliable service throughout the whole project. The Communication between everyone on site was continuous which ensured clarity with all staff members. The Kaymac team had a great understanding of the project as a whole particularly with the safety and site-specific tasks that were required, and as a result, the project was very successful.

Peter Curry, Hull City Council
Hull Marina Lock Gate Maintenance

Kaymac are always the go-to solution for my diving requirements.

Andy Harries, Wessex Water
Fantastic Service!

Kaymac have supported the BPC now for over 20 years and continue to provide a top service on planned and unplanned work, always flexible around the tides as well.

Ian Russ, Port Engineer, Bristol Port Company.
De-silting and Diving Inspections

Kaymac have been an integral part of the project team, their input into problem-solving through developing options and temporary works solutions has been valuable in overcoming challenges. The Kaymac team are very knowledgeable when it comes to marine civils, highlighting risks and developing methodologies. When working on site the team from Kaymac are professional, helpful, and positive, and they carry out their works safely and diligently, which have included specific safe systems of work including diving and confined space working. Their quality management & handover processes are also robust and proactive.

Alex Gentleman, Project Manager, Balfour Beatty TEAM2100
Tilbury Dual Function Lock Gates, Pintle Replacement

“Kaymac have always provided an excellent, economic, efficient and effective service. They have delivered quality workmanship, safely, to programme and within available budget. They were easy to work with on site and the final account was settled amicably, with no disputes. I will look forward to working with them again.”

Gordon Randlesome BSc(Hons), C.Eng, MICE. Principal Engineer, Swansea Council
Tawe Barrage Lock Gate Maintenance

I’d like to say thanks for all your help in competing the remedial works to Crickhowell and Llangynidr bridges ready for another winter. Dean and his team worked well, were professional at all times and really easy to work with. CADW are happy with the repairs and we have even had a few locals stop and say how great the repairs look.

Jon Watson, Civil Engineer MICE Engtech, Powys County Council.
Crickhowell & Llangynidr Bridge Repairs
About us
Kaymac are market leaders in specialist subsea and marine engineering

With over four decades of experience, our specialist involvement is widely acknowledged by our clients. We provide innovative marine civil engineering solutions to meet the needs of our customers- It is our exceptional customer focus and deep understanding of their needs which builds strategic long-term relationships.

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