Not quite in the way you're describing.
They have a team of 'Entertainment Technicians', some of who will have experience and ability to do creative work. But their focus will be more on the technical work for events, rather than scenic work.
The park work closely with external companies, like Unique Concepts and UVE, to provide creative scenic work. In the last couple of years, there's also been overlap of Thorpe and Chessington departments - for example, I believe the Creek Freaks Unchained float used during last FN was designed and made by Chessington's creative team.
In the past, Thorpe have had more scenic creative individuals, and have pushed for a more dedicated department. Unfortunately, for one reason or another, it just has happened.