Leggett joined on 6 August from Keith Prowse where she was a senior event manager at the Kia Oval cricket ground.
Leggett said she is already relishing her new role.
"I am delighted to be working with Jam Staffing and their current clients, and playing a part in developing the brand," she said. "I have found myself working in a great team and truly looking forward to helping expand the company. It is a hugely exciting opportunity and I am looking forward to the challenges ahead."
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