Accenture, RBS, Aegis, American Express and Novarti are among clients that Wyatt worked with during her six years at The Finishing Touch.
Wyatt said: "After working across a broad spectrum of industry sectors and clients, from surfing competitions, international golf events, corporate conferences and parties, I wanted the opportunity to focus on one brand. I am looking forward to the opportunity to grow and working in a team with such diverse experiences and specialities."
In addition, Sophie Fraser has been appointed as an account executive in the Ford Group.
Imagination’s business and special projects director Richard Foulkes said: "Imagination is all about transforming business through creativity, and so it is important that we have the logistical infrastructure in place to support and deliver our innovative ideas.
"We are very excited to have Esther and Sophie join the Imagination team."