Symonds was operations director at Laing O’Rourke and one of a raft of senior figures who left earlier this year during a management reshuffle.
Symonds has over fifteen years experience project-managing large infrastructure projects including leading a team in the pre-construction phase of Crossrail.
WSP UK Deputy Managing Director Mark Naysmith said: “Developing our capability in infrastructure across a wider sector base is key to our long-term growth strategy.
“Duncan’s experience and expertise will help us continue to grow our UK infrastructure division.”