Kelly McGinnis, VP of global communications at Dell, is quitting as the PC maker's $25B buyout plan engineered by Michael Dell faces heavy opposition from institutional investors spearheaded by Vanguard Group, State Street and BlackRock.

Kelly McGinnisDell’s management has rescheduled today's shareholder vote on the deal to July 24. It gave the need for "additional time to solicit proxies from Dell shareholders" as the reason.

McGinnis will exit at the end of the month and join Levi Strauss on Aug. 5, taking over for Jill Nash.

She joined Dell in 2010 from Enfatico, which handled its PR and advertising.

Karen Quintos, Dell’s marketing chief, credited McGinnis for improving the company's "reputation and credibility as an end-to-end solutions provider through strategic events, thought leadership campaigns and M&A activities, yielding substantial increases in positive share of voice."

Marc Bien, Dell communications manager who worked on reputation issues, mergers & acquisitions and leveraged buyout communications, will assume McGinnis' duties.