From our engineering and project management offices in Ely, Cambridgeshire, and fabrication and assembly facility in Swansea, South Wales, we undertake the complete design and supply of skid mounted or packaged equipment.

Since 1989, OGS has supplied to satisfied clients throughout the world. We are accredited by major international operators in the oil, gas and power industries, gas turbine producers and EPC companies. Our scope of supply includes the responsibility for all stages of project execution including initial design, detailed design of process, mechanical, electrical, control and instrumentation, manufacturing, testing, packing and shipping. We also provide a site erection and commissioning service if required.


OGS supply Fiscal Metering Systems, Allocation Metering and Custody Transfer Metering Systems for a wide range of fluids including oil, gas and condensate.

Fuel Gas Conditioning

OGS supply complete modules for the provision of clean, dry, metered gas at the required pressure and temperature from an untreated, unregulated gas source.

Reciprocating Compressors

OGS are the approved European packager/distributor of Ariel Reciprocating Compressors. Each system is tailored to match project and operational demands.

Sampling & Analysis

We design and deliver packaged online and offline process analysis solutions primarily for the upstream and downstream Oil & Gas, Refining and LNG industries.

Produced Water Treatment

OGS supply Produced Water Treatment packages utilising Hydrocyclones, Desanding Hydrocyclones and all types of process equipment.

After Sales Services

OGS offers a range of after sales services to help customers avoid delays and unplanned downtime, thereby eliminating the financial impact of lost operation and revenue.

Engineering Services

OGS can carry out FEED studies of packaged equipment in collaboration with end users/operators, as well as site surveys of existing installations.


Download the latest OGS brochures, accreditations, approval certificates, reference list and case studies of completed projects.