About us
Our expertise is in two major markets: industrial and marine, with generator applications ranging from 10kVA to 2,500kVA.
Corporate Capabilities
Our capabilities are wide ranging:
Mechanical and electrical design
With an experienced team of engineers in our design office we work alongside our clients and their advisors to produce the solution they require. All of these are available in 2D and 3D CAD drawings.
Metal fabrication
Using a skilled team of coded welders we fabricate to meet the clients needs, working with a range of metals including mild steel, stainless steel, aluminium, cast iron and Zintec
Mechanical and electrical assembly
Following our exacting quality standards, our engineers assemble all the mechanical components and required electrical cabling. These are inspected at various stages within the process to ensure the highest quality finished product.
High Quality painting and finishing
We meet the stringent requirements of the Ministry of Defence, Superyacht builders, and off shore platforms using a variety of paints and techniques to ensure that however harsh the environment our products will be protected.
Testing and inspection
Testing can be undertaken in specifically designed test bays at our factory which include various cooling configurations depending on the clients requirements. Testing and presentation of witness tests are also undertaken following Classification Societies rules, Military and Commercial Standards, NHS Trust requirements and WIMES/Petro/Chem application requirements.
Testing can also be undertaken on site using loadbanks or site load, including simulations and complete black building/black start exercises.
Installation and Commissioning
From site delivery and generator positioning through pipework and wiring, testing, cleaning and final handover for industrial applications; to on board installation support, full commissioning and sea trials for marine applications; G&M have the expertise and quality to deliver our clients’ solutions.
Servicing
Our qualified service engineers have over 30 years experience in servicing and replacing generators, with direct access to world class technical support and an experienced backup team in our extensive factory facilities. Whether you require annual service contracts, one off servicing or generator retrieval and full factory servicing and testing G&M Power Plant can provide the solution.
Quality Standards
We can design, build and test to the following Classification Society Rules:
| American Bureau of Shipping | ABS |
| Bureau Veritas | BV |
| China Classification Society | CCS |
| Det Norske Veritas | DNV |
| Germanischer Lloyds | GL |
| Korean Register of Shipping | KRS |
| Lloyds Register of Shipping | LR |
| Italian Register of Shipping | RINA |
| Hellenic Register of Shipping | HRS |
| Russian Register of Shipping | RRS |
| US Military Specifications | MILSPEC |
| MoD (UK) Defence Standards | DEFSTAN |
| NATO Standards | NATO |
We are a member of the British Marine Federation and abide by its Code of Practice.
We are fully registered as a supplier on the Utilities Vendor Database for a full range of product/service categories.
We are ISO9001:2008 registered for:
- the design, sale, manufacture, test, installation and service of power generation equipment for marine, industrial and military applications;
- the design, manufacture, installation and servicing of auxiliary engine driven electrical generating sets and associated control systems for marine, military and industrial applications.

A Brief History
| 1938 | G&M Power Plant Established |
| 2002 | Countryman Power Ltd Established |
| 2005 | Re-located to modern facilities, streamlining operations whilst retaining key staff |
70 Years Experience
G&M has over 70 years experience in
- Design
- Manufacture
- Testing
- Installation; and
- Commissioning
of Electrical Power Generation Equipment
Contacting Us
G&M Power Plant Ltd Magnet House 31 Anson Road Martlesham Heath Ipswich Suffolk IP5 3RG T. +44 (0)1473 662777 F. +44 (0)1473 662785 E. sales@gmpp.co.uk For full contact details and a contact form, please view ourĀ contact us page.
Download Presentation
View our full corporate overview as a PDF. We also have PDF versions of our case study references, along with our industrial and marine generators.


