The target was unveiled as O’Rourke supported the government’s ‘Your Life’ campaign to encourage more women into engineering.
O’Rourke also said that 40% of undergraduate sponsorship opportunities would be offered to women by 2016.
Anna Stewart, Group Chief Executive, Laing O’Rourke said: “Opportunities abound in engineering and construction for women with the intellect and ambition to fulfil their potential and help drive our industry forward.
“The engineering and technology sectors need to be bold and innovative in attracting new talent from all walks of life.
“That’s why I firmly believe that positively promoting workforce diversity through programmes like Your Life will have a transformational effect on the way we respond to the challenges of a post-recession world, driving greater adoption of new technologies and ways of working.”