Grass Roots chairman David Evans told Event her abrupt departure was "bizarre".Litzow is the second high-profile departure this year after global head of events Nick Bender announced he was leaving in July.
Grass Roots chairman Evans has interviewed around a third of the company’s 160 staff in the last two weeks to better understand the business and make new internal appointments.
"I feel like a chairman of a football club that didn’t know his players. I left Nick Bender in charge and he decided to up sticks and go," he told Event.
He added: "It’s been really energising and motivating to [interview staff] because there’s a lot of bright people there who need some proper leadership."
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