


Employees at Gilead Sciences rank Daniel O’Day in the Top 50% of similar sized companies. Comparatively, employees at Merck rank Rob Davis in the Top 10% of similar sized companies. Employees rate their CEO differently based on the frequency of interaction, ability to affect company culture, and drive measurable results.

Women at Gilead Sciences rated their CEO a B

Women at Merck rated their CEO a B+

Diverse Employees at Gilead Sciences rated their CEO a B

Diverse Employees at Merck rated their CEO an A+



At Gilead Sciences, employees in the Engineering department rate Daniel O’Day the highest. According to employees, Daniel O’Day's ability to drive business results is Good. At Merck, the Design department's employees rate their CEO highest. And, 75% of Merck's employees approve of their CEO's management style.