A. Reyrolle & Company was a British engineering firm based in Hebburn, Tyne and Wear in the North East of England.

The company was founded by Alphonse Constant Reyrolle [de], a French electrical engineer and entrepreneur,[1] in 1886 at Fitzroy Square in London to produce scientific instruments.

[3] At its peak it manufactured switchgear for power stations worldwide and employed 12,000 people.

[7] Siemens supported the Reyrolle installed base on a global basis, with Operations and Protection based at the remaining section of the original Reyrolle Works in Hebburn, although this constitutes only around 10 percent of the original site.

[8] The Major Projects division is based at a modern office building on the nearby Monkton Business Park.