It decided to move its operation to a new plant in Stalybridge, after outgrowing its old facility in Ashton-under-Lyne.
The new plant will be able to process about 25,000 tonnes of material a year – the equivalent of over 3 million desk top computers.
Sims regional manager Jason Price said: “Our client list has expanded rapidly over the past year or so, even though the WEEE Directive has yet to be transposed.”
He said many blue chip clients had taken early compliance measures as part of their corporate social responsibility programmes.
The new plant is part of the group’s WEEE growth strategy, which aims to take its European electronics recycling capacity to over 150,000 tonnes a year, and expand its business in Australia and the US.
Sims is planning a number of “major developments” to coincide with the implementation of the WEEE legislation in July.