


Employees at Aramark rank John Zillmer in the Bottom 15% of CEOs in Philadelphia, PA. Comparatively, employees at Serco rank David Dacquino in the Top 40% of CEOs in Washington, DC. Employees rate their CEO differently based on the frequency of interaction, ability to affect company culture, and drive measurable results.

Women at Aramark rated their CEO a D

Women at Serco rated their CEO a D

Diverse Employees at Aramark rated their CEO a C-

Diverse Employees at Serco rated their CEO a C


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At Aramark, employees in the Engineering department rate John Zillmer the highest. According to employees, John Zillmer's ability to drive business results is Very Bad. At Serco, the IT department's employees rate their CEO highest.