The company has confirmed that chief executive Anna Stewart will be overseeing European operations alongside her current duties.
Robinson joined O’Rourke in 2009 after ten years at Carillion.
He was appointed head of Europe in 2010 reporting directly to Ray O’Rourke.
Robinson will not be leaving the company completely and will continue in a senior role overseeing projects including Hinkley Point.
Laing O’Rourke said: “Roger Robinson will step down from his role as lead of Laing O’Rourke’s Europe Hub at the end of this month.
“He will remain, however, in the company as a senior executive with responsibility for a wide range of important relationships and aspects of the business including Laing O’Rourke’s joint venture with Bouygues at Hinkley Point C.
“Anna Stewart will combine her duties as Chief Executive with Managing Director of the Europe Hub.”