| Client name | City | Country |
|---|---|---|
| Aker Kvaerner Engineering Services Ltd | Stockton on Tees | United Kingdom |
| Amec Foster Wheeler Group Ltd | Knutsford | United Kingdom |
| Aughinish Alumina Ltd | Aughinish Island | Ireland |
| BP Chemicals Ltd | Hull | United Kingdom |
| BP International Limited | Sunbury on Thames | United Kingdom |
| CIMTech International Ltd. | Stockton, Cleveland TS16 9BT | United Kingdom |
| Control Valves UK Ltd. | Wigan | United Kingdom |
| Eckardt Foxboro Great Britain | Watford, Hertfordshire WD18YH | United Kingdom |
| Endress + Hauser Ltd | Manchester | United Kingdom |
| EniProgetti SpA | Basingstoke | United Kingdom |
| ESB Electricity Supply Board | Dublin 2 | Ireland |
| ExxonMobil Chemical Limited | Cowdenbeath | United Kingdom |
| ExxonMobil Engineering Europe Ltd | Southampton | United Kingdom |
| Fluor Limited | Farnborough | United Kingdom |
| Jacobs | Portsmouth | United Kingdom |
| Jacobs Engineering Inc. | Glasgow | United Kingdom |
| SAMSON Controls (London) LTD | Redhill, Surrey | United Kingdom |
| Score (Europe) Ltd | Brighouse | United Kingdom |
| Score (Europe) Ltd. | Leeds | United Kingdom |
| Severn Unival Ltd | Brighouse | United Kingdom |
| Shell International Petroleum Company | London | United Kingdom |
| Sur-Tech Instruments Ltd. | Thetford | United Kingdom |
| Tge Gas Engineering Gmbh | Manchester | United Kingdom |
| Weir Valves & Controls | Huddersfield | United Kingdom |
| Wilson UK Ltd. | Gorleston | United Kingdom |
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