As well as its headquarters in Aberdeen, NSL has two bases in the United States, in Louisiana and Texas.
The value of the acquisition was not disclosed but Asco stressed that all of NSL’s staff would remain with the business. NSL was founded in 1989 by owners Tom Byrne and Richard Dingwall.
Derek Smith, Asco’s chief operating officer, said: “Our priority is to quickly and smoothly integrate the teams from NSL so that our combined teams can focus on delivering even more value to our client base.”
Asco has some 1,600 people worldwide.