Cook County, Illinois / Office Chief Administrative Officer

Agency file

Office Chief Administrative Officer

Source file: Cook County, Illinois — Employee Payroll / ingested Jun 19, 2026

The Office Chief Administrative Officer is a government agency that delivers public services and programs within its jurisdiction.

In 2018, this agency had 78 employees with median total compensation of $16,070; the highest distinct record was $44,423.

Year: 2018
Total payroll: $1.4M
Employees: 78
Median total: $16,070
Highest record: $44,423

What the records show

Compensation analytics

These summaries compare pay within the agency before listing individual records.

Salary distribution

$1,577$31,629+

Hover a bar for its range; click to filter the list below.

How 2018 total compensation is spread across the 78 employees. Each bar is a pay range; taller bars mean more people earn in that range. The amber line marks the median ($16,070) — half earn less, half more. The far-right bar collects the highest earners.

Average pay composition

Base — $17,533 (100%)
Overtime — $0 (0%)
Other — $0 (0%)
Benefits — $0 (0%)

What an average paycheck here is made of — base salary versus overtime, other pay (bonuses, allowances), and benefits. A large overtime or other-pay share means take-home often exceeds base salary.

Pay percentiles

10th

25th

Median

75th

90th

$11,862

$12,829

$16,070

$21,527

$27,761

The pay ladder for this department. Someone at the 90th percentile earns $27,761 — more than 90% of the department; the 10th percentile earns $11,862. The shaded band is the middle half of employees (25th–75th percentile).

Largest job titles

Clerk V

11 · $12,716

Animal Control Warden

6 · $16,349

Clerk V (Seiu73)

5 · $14,162

Clerk IV (Seiu73)

4 · $12,971

Administrative Assistant III

3 · $18,101

The most common job titles in this department by headcount, with the median total compensation for each. Click a title to see everyone who holds it.

Trend

Year over year

How this department's total payroll, headcount, and median pay changed across the 3 published years.

Year	Total payroll	Employees	Median pay
2016	$1.4M —	89 —	$15,158 —
2017	$1.5M ▲ 4.4%	83 ▼ 6.7%	$16,608 ▲ 9.6%
2018	$1.4M ▼ 6.5%	78 ▼ 6.0%	$16,070 ▼ 3.2%

Compare

Similar departments

Departments elsewhere with the most similar mix of roles — a proxy for the same kind of agency, matched by workforce composition rather than name. Pay is not cost-of-living adjusted.

County Clerk Cook County, Illinois67% match
Court Records Allegheny County, Pennsylvania64% match

Record list

Employees

Page 1

Martha Martinez

Chief Administrative Officer/Office Chief Administrative Officer

2018 total comp

$44,423

Base pay: $44,423
Overtime: $0
Other pay: $0
Benefits: $0
Total compensation: $44,423
Hire date: 1981-06-16
Middle name: A

Source-specific fields

Employee Identifier: 32311623-f4ed-4639-bd6a-d41dfd57b636
Fiscal Period: 2018Q2
Fiscal Quarter: 2
Job Code: 52
Office: 1011
Position Id: 9500105

Martha Martinez is a Chief Administrative Officer at Office Chief Administrative Officer. Hired in 1981, they have about 37 years of service. 2018 total compensation came to $44,423.

Jerry Pray

Industrial Engineer IV/Office Chief Administrative Officer

2018 total comp

$33,654

Base pay: $33,654
Overtime: $0
Other pay: $0
Benefits: $0
Total compensation: $33,654
Hire date: 1991-07-01
Middle name: A

Source-specific fields

Employee Identifier: 727e40e8-7b8c-450e-b2b8-db324e11b1ee
Fiscal Period: 2018Q2
Fiscal Quarter: 2
Job Code: 2284
Office: 1011
Position Id: 9500122

At Office Chief Administrative Officer, Jerry Pray serves as a Industrial Engineer IV. Hired in 1991, they have about 27 years of service. Their 2018 pay totaled $33,654.

Mark Rosenthal

Deputy Director/Office Chief Administrative Officer

2018 total comp

$31,629

Base pay: $31,629
Overtime: $0
Other pay: $0
Benefits: $0
Total compensation: $31,629
Hire date: 2011-06-20
Middle name: A

Source-specific fields

Employee Identifier: 675e2374-1406-4185-b685-c01ac0e310fb
Fiscal Period: 2018Q2
Fiscal Quarter: 2
Job Code: 5204
Office: 1011
Position Id: 1001009

Mark Rosenthal holds the role of Deputy Director at Office Chief Administrative Officer. They have served since 2011 (about 7 years). In 2018, their total compensation was $31,629.

Xochitl Flores

Deputy Chief Administrative Officer/Office Chief Administrative Officer

2018 total comp

$31,610

Base pay: $31,610
Overtime: $0
Other pay: $0
Benefits: $0
Total compensation: $31,610
Hire date: 2011-03-28

Source-specific fields

Employee Identifier: ea06e129-5c5a-42c5-81d5-fab5bf22f794
Fiscal Period: 2018Q2
Fiscal Quarter: 2
Job Code: 5299
Office: 1011
Position Id: 1000980

Xochitl Flores is a Deputy Chief Administrative Officer at Office Chief Administrative Officer. They have served since 2011 (about 7 years). 2018 total compensation came to $31,610.

Donna Alexander

Animal Control Administrative Director/Office Chief Administrative Officer

2018 total comp

$30,956

Base pay: $30,956
Overtime: $0
Other pay: $0
Benefits: $0
Total compensation: $30,956
Hire date: 2007-09-04
Middle name: M

Source-specific fields

Employee Identifier: ea4ac9ba-231c-4e49-95e0-87199cee8745
Fiscal Period: 2018Q2
Fiscal Quarter: 2
Job Code: 2040
Office: 1011
Position Id: 9518064

Donna Alexander is a Animal Control Administrative Director at Office Chief Administrative Officer. Hired in 2007, they have about 11 years of service. 2018 total compensation came to $30,956.