Simon has worked with Davis Langdon since joining the Cost Research department in 1980.  He managed this department between 1982-1984, following which he joined one of the teams, specialising in retail and office development for private sector clients. 

Simon became a Partner of this team in 1986 and he has maintained his focus on private commercial work since then, working with repeat clients such as Land Securities, Hammerson, Stanhope, Chelsfield, Westfield, BAA McArthur/Glen etc.

His projects have included the Commerzbank Tower in Frankfurt, the tallest building in Europe, and Westfield Shopping Centre in London.

Simon became the Managing Partner in 2008 and as such has responsibility for service delivery and business performance across Europe and the Middle East.