Griggs has worked at ISES since 2010, where her role evolved from managing operations for the UK chapter to include Europe, the Middle East and Africa regions.
She will continue in her position as ISES EMEA brand champion, driving the association's brand strategy across the EMEA chapters.
"I feel very proud of what I have achieved over the last four years, with the opportunity to work with so many creative event professionals, both in our membership and at board level," Griggs said.
Kevin Jackson, vice president of George P Johnson, added that he was looking forward to working with Griggs and continuing to develop the agency's client business.
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