The Scotland-based energy services company, Wood Group, says it has laid off 13 percent of its employees since the end of last year amid a global oil price fall.

The announcement came on Tuesday with company sources saying that Wood Group has already reduced its workforce by 5,000, following suit with several other oil services groups, as crude prices have fallen by more than half over the past year.

"Group headcount is down 13 percent from the position in December and 17 percent from June 2014," Wood Group said in a statement.

The statement added, "Conditions in oil and gas markets remain very challenging and we are witnessing a sustained period of low oil prices in 2015 following the increase in focus by operators on efficiency in 2014."

Wood Group, which is mainly present in the North Sea and the Americas, added in its statement that its net profit has fallen by 17 percent to hit USD 116.8 million (106 million euros) in the first six months of 2015 compared to the similar period in 2014.

The company’s revenue also decreased by 19 percent during the same period to hit USD 3.07 billion.

Last month, Saipem energy services group, which is a subsidiary of Italian oil giant, ENI, announced that it plans to cut 8,800 positions over three years.

Royal Dutch Shell, for its turn, is also planning to reduce its staff by 6,500 this year while Britain's biggest domestic energy provider, Centrica, is expected to reduce its workforce by 4,000 positions.