Each night we deploy 45 to 50 teams of welders and assistants across the UK rail network.


We are certified to ISO 3834 WFCS and RISQS approved to deliver the following:

  • Aluminothermic welding

  • Arc welding

  • Rail grinding

  • Scrap Rail Burning 

  • Welding Training




Welding teams working across all contracts


Weld Rejection Rate

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GPX Engineering Ltd is an established railway contractor specialising in providing welding resource for the railway industry, working directly for Network Rail, Transport for London and key contractors to improve the UK’s rail infrastructure.


GPX is a preferred supplier of welding services to Network Rail across all territories and delivers on a national scale.  Leading the field in performance and innovation within the rail welding sector GPX offers a wealth of experience and technical knowledge gained from working within the rail industry for the past 13 years.


Our head office/depot at Northfields Industrial Estate in Wembley is also the home of our training centre, licensed to provide training to both our own technicians and external candidates. Our Senior Welding Trainer has over 25 years’ welding training experience and offers courses in:

  • Aluminothermic welding – Thermit and Railtech

  • Manual metal arc welding and flux core wire welding

  • Weld inspection

  • Plant proficiency

  • Manual handling

  • Gas cutting

  • Gas safety

  • Grinding