Stahl started her new role at Top Banana on 14 July after joining Grass Roots in 2013 as strategic account director.
She had previously spent nine months freelancing in the industry after five years as head of events at Havas People between 2008 and 2013.
Stahl told C&IT: "I had always heard good things about Top Banana, which is what attracted me to the agency. The company has just completed a very successful year and they are being proactive in looking for new and enhanced offerings for their clients.
"The strategy director role is a new position for Top Banana. It was created to further strengthen our commitment to getting ourselves immersed in our clients' brands, helping them to deliver leadership-driven events.
"In the role, I will be looking at the big picture, ensuring that we can innovate and grow with our clients, understanding their strategy, their brand, their people and their messages to deliver results."