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Valero is the world’s largest independent petroleum refiner with 19 refineries across the world. In 2011, Valero expanded into the European refining market by acquiring the Pembroke refinery in South West Wales from Chevron.

Opening in 1964, the 270,000 barrel-a-day Pembroke refinery is one of the largest, most complex refineries in Western Europe. It generates products including gasoline, diesel fuel, kerosene, liquefied petroleum gas, petrochemical feedstocks and also has the ability to process difficult heavy crudes, such as those produced from the tar sands in Canada. The refineries scale, location, flexibility and logistical advantages enhance Valero’s optimisation and trading strategy in the Atlantic Basin.

In October 2012, the refinery underwent a major maintenance Turnaround at Pembroke to allow for necessary maintenance and mechanical project work. We supplied Valero with 38 people over 3 months undertaking some very challenging routine and specialist bespoke work in difficult conditions; whilst acheiving a 100% safety record. This contributed towards the safest major Turnaround completed at Pembroke Refinery.

Take a look at the letter we recently received from Valero as a thank you for our work.

Global On-site Machining Services


We are serving the Petrochemical, Marine, Steel and General Industries with On-Site Machining, In-Situ Machining and Controlled Hydraulic Bolting services.

Our Customers

Our customers are some of the biggest in the world. We specialise in providing, and executing engineering solutions and on-site services designed to maintain the integrity of production and process plants. 



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Total Peace Of Mind


Every member of the M & A Engineering team take responsibility to protect themselves, colleagues, customers and the community we impact. This ensures a safe and accident free work environment.