Keeping You
Switched On

Welcome to GCM Ltd,

leading provider of generator control and maintenance services
in Colchester, and the surrounding areas.


Generator Control and Maintenance Ltd

…which means you’ll always be supported by an expert in standby power, from the very first phone call to the final installation. Our 30 years of experience in the industry, combined with a passion for what we do, ensure we always deliver the cover you need.

The quality of our support is everything. We only work with a group of tried and trusted suppliers and use the most reliable and effective equipment – which doesn’t always mean the most expensive. And, as Generators and Control Systems are continually changing, we keep abreast of all the latest developments to provide you with robust long-term solutions.

We are a dynamic and responsive team because power is so critical, when you need to move fast, we will too.

We pride ourselves on our dedication to customer service.
We work closely with our clients to understand their unique needs and requirements, and we always strive to provide the best possible solutions for each individual case. 

Our team is made up of experienced professionals who are passionate about what they do. We are committed to staying up-to-date with the latest industry trends and technologies to ensure that we are always offering the most advanced solutions to our clients.

At GCM Ltd, we are committed to providing reliable and efficient solutions for all of your generator needs. Whether you need help with the generator installation, generator maintenance, or generator repair, our team of skilled professionals is here to help. 

We understand that generators are an essential part of many businesses and organisations, providing backup power in case of emergencies or power outages. That’s why we offer a range of services to ensure that your generator is always running at peak performance.







Areas we Cover

Generator Control and Maintenance Ltd
Areas we Cover | GCM Ltd
We work across the whole length and breadth of the UK. Although based in Essex, we have strategically based local engineers across the country. This allows us to provide you with fast response times and a personalised service, wherever you are based.

What our clients say about us

Ritchie has been looking after my generators for the last 22 years, first with Turner Diesel and a couple of other firms before branching out with his own company GCM. We’ve always had a good relationship and have found him helpful, reliable and very knowledgeable, the go-to guy for all things generator-related. His particular forte is panels, switchgear, fault finding – he excels in these areas! 

He currently looks after all my generators and has managed many projects including complete replacement installations within the Parliamentary Estate.

Mick Tayler,
Facilities Management, Houses of Parliament