He joins from Aecom, where he was responsible for leading the corporate solutions and hotels sectors and previously the Sweett Group, where he was as board director and head of project management.
At Turner & Townsend Mr Nash will focus on the commercial developer, corporate occupier and hotels market.
He said: “Turner & Townsend has a demonstrable track record of working with the best clients. I am excited to help drive the company forward as we continue to deliver the highest quality of service and provide leading solutions to our clients in the commercial and hospitality sectors.
“With indicators suggesting pick-up in the commercial market, particularly across London and the southeast, it is a great time to join this fast-growing company.”
Turner & Townsend’s UK managing director, Steve McGuckin, said: “We are delighted to welcome Paul on board. His experience of working with great clients at the top of their game, such as Hilton International and Barclays, on complex projects from an idea to operational, is absolutely in line with Turner & Townsend’s approach to service delivery.
“Commercial and hospitality continue to be key sectors for us. By securing an experienced and recognised leader in Paul, we strengthen our team and our service, to meet the opportunities and challenges of improving market conditions.”