John Zillmer vs Daniel Ryan | Comparably
Profile Image
VS
Aramark Claimed Company
EMPLOYEE
PARTICIPANTS
827
TOTAL
RATINGS
7802
ISS Group Claimed Company
EMPLOYEE
PARTICIPANTS
72
TOTAL
RATINGS
802

John Zillmer vs Daniel Ryan

John Zillmer Aramark's CEO
John Zillmer
Aramark
Bottom 20%
Bottom 20% of Similar Size Companies on Comparably
D
58/100
VS
Daniel Ryan ISS Group's CEO
Daniel Ryan
ISS Group
Top 10%
Top 10% of Similar Size Companies on Comparably
A
78/100

Aramark vs ISS Group CEO Comparison Summary

Employees at Aramark rank John Zillmer in the Bottom 15% of CEOs in Philadelphia, PA. Comparatively, employees at ISS Group rank Daniel Ryan in the Top 15% of CEOs in San Antonio, TX. Employees rate their CEO differently based on the frequency of interaction, ability to affect company culture, and drive measurable results.

Gender Score

John Zillmer Aramark's CEO
John Zillmer
Aramark
Bottom 20%
Bottom 20% of Similar Size Companies on Comparably
D
Gender

Women at Aramark rated their CEO a D

Daniel Ryan ISS Group's CEO
Daniel Ryan
ISS Group
Top 5%
Top 5% of Similar Size Companies on Comparably
A+
Gender

Women at ISS Group rated their CEO an A+

Diversity Score

John Zillmer Aramark's CEO
John Zillmer
Aramark
Bottom 35%
Bottom 35% of Similar Size Companies on Comparably
C-
Diversity

Diverse Employees at Aramark rated their CEO a C-

Daniel Ryan ISS Group's CEO
Daniel Ryan
ISS Group
Top 40%
Top 40% of Similar Size Companies on Comparably
B-
Diversity

Diverse Employees at ISS Group rated their CEO a B-

Question:
Do you approve of your CEOs management style?

Question:
How would you rate the effectiveness of your CEO to drive business results?

John Zillmer Aramark's CEO
John Zillmer
Aramark
Excellent
23%
Good
22%
Average
11%
Poor
22%
Very Bad
22%
Daniel Ryan ISS Group's CEO
Daniel Ryan
ISS Group
Excellent
50%
Good
0%
Average
25%
Poor
25%
Very Bad
0%

Who Ranks the CEO highest?

At Aramark, employees in the Engineering department rate John Zillmer the highest. According to employees, John Zillmer's ability to drive business results is Excellent. At ISS Group, the Engineering department's employees rate their CEO highest. And, 60% of ISS Group's employees approve of their CEO's management style.

John Zillmer Aramark's CEO
John Zillmer
Aramark
80/100Department - Engineering
68/100Ethnicity - African American/Black
73/100Tenure - 1 to 2 Years
79/100Education - High school
62/100Experience - 1 to 3 Years
Daniel Ryan ISS Group's CEO
Daniel Ryan
ISS Group
74/100Department - Engineering
79/100Ethnicity - Caucasian
68/100Tenure - 2 to 5 Years
82/100Education - Bachelor's
98/100Experience - 1 to 3 Years