Tucci, who is also EMC's chief executive, denied reports of friction between himself and Greene.
"I have a lot of respect for Diane. She's done a great job," he said. "We wanted her very badly to stay with the company in a different role, but a very significant role." But Tucci said Greene was unwilling to remain in any other job.
Tucci said he hopes that Greene's husband and VMware cofounder, Mendel Rosenblum, will stay on as VMware's chief scientist.