Battley, who left BI Worldwide in January after three years in the role, will now take up the position of account director.
Battley said: "I’m thoroughly looking forward to joining Grass Roots, a company with an outstanding reputation and one that I have long admired.
"I firmly believe I can utilise my knowledge and skills within the global account management arena and contribute to the growth and success of a business which is clearly set for an exciting future."
Kevin Robinson, client services director at Grass Roots Meetings & Events added: "David is highly regarded in the industry and brings a wealth of senior-level experience, both operationally and at a relationship management level.
"David's appointment supports our growth ambitions and further strengthens our account management team to deliver to the highest standards."
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