Cook County, Illinois / Office Inspector General

Agency file

Office Inspector General

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

The Office Inspector General is a government agency that delivers public services and programs within its jurisdiction.

In 2018, this agency had 17 employees with median total compensation of $26,673; the highest distinct record was $43,692.

Year: 2018
Total payroll: $435.1K
Employees: 17
Median total: $26,673
Highest record: $43,692

What the records show

Compensation analytics

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

Salary distribution

$7,892$43,692+

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

How 2018 total compensation is spread across the 17 employees. Each bar is a pay range; taller bars mean more people earn in that range. The amber line marks the median ($26,673) — half earn less, half more. The far-right bar collects the highest earners.

Average pay composition

Base — $25,597 (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

$19,002

$22,403

$26,673

$28,585

$31,426

The pay ladder for this department. Someone at the 90th percentile earns $31,426 — more than 90% of the department; the 10th percentile earns $19,002. The shaded band is the middle half of employees (25th–75th percentile).

Largest job titles

Investigator III

4 · $22,628

Investigator V

3 · $27,077

Deputy Inspector General

2 · $31,426

Investigator Iv-Oiig

2 · $26,943

Investigator IV Financial

2 · $26,153

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	$523.2K —	21 —	$25,633 —
2017	$468.9K ▼ 10.4%	19 ▼ 9.5%	$26,093 ▲ 1.8%
2018	$435.1K ▼ 7.2%	17 ▼ 10.5%	$26,673 ▲ 2.2%

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.

Dcpc District of Columbia63% match
State Board of Veterinary Medical Examin Texas63% match
Oig Office of Inspector General City of Philadelphia62% match
Civilian Complaint Review Bd New York City58% match
Labor License & Regulation South Carolina48% match
Banking and Insurance New Jersey44% match

Record list

Employees

Page 1

Rachel Marrello

Investigator V/Office Inspector General

2018 total comp

$28,585

Base pay: $28,585
Overtime: $0
Other pay: $0
Benefits: $0
Total compensation: $28,585
Hire date: 2010-07-19

Source-specific fields

Employee Identifier: 4c604b08-41d4-45d4-8bde-5d98290082df
Fiscal Period: 2018Q2
Fiscal Quarter: 2
Job Code: 642
Office: 1080
Position Id: 1100442

Rachel Marrello holds the role of Investigator V at Office Inspector General. Their tenure dates to 2010, about 8 years. In 2018, their total compensation was $28,585.

Robert Burton

Investigator Iv-Oiig/Office Inspector General

2018 total comp

$27,212

Base pay: $27,212
Overtime: $0
Other pay: $0
Benefits: $0
Total compensation: $27,212
Hire date: 2011-08-15
Middle name: M

Source-specific fields

Employee Identifier: 7a9f9eb9-4059-4b9d-b2c0-f6a903c6d44b
Fiscal Period: 2018Q2
Fiscal Quarter: 2
Job Code: 5575
Office: 1080
Position Id: 1100440

Robert Burton holds the role of Investigator Iv-Oiig at Office Inspector General. Their tenure dates to 2011, about 7 years. In 2018, their total compensation was $27,212.

Daniel Tiernan

Investigator V/Office Inspector General

2018 total comp

$27,077

Base pay: $27,077
Overtime: $0
Other pay: $0
Benefits: $0
Total compensation: $27,077
Hire date: 1988-10-25
Middle name: O

Source-specific fields

Employee Identifier: 31498a3a-a67f-4cef-b386-a10cd629dfaf
Fiscal Period: 2018Q2
Fiscal Quarter: 2
Job Code: 642
Office: 1080
Position Id: 9701567

At Office Inspector General, Daniel Tiernan serves as a Investigator V. They have served since 1988 (about 30 years). Their 2018 pay totaled $27,077.

Frank Bochte

Investigator Iv-Oiig/Office Inspector General

2018 total comp

$26,673

Base pay: $26,673
Overtime: $0
Other pay: $0
Benefits: $0
Total compensation: $26,673
Hire date: 2013-10-21
Middle name: J

Source-specific fields

Employee Identifier: 4511ae73-13b7-4d93-abc1-2450a26a9448
Fiscal Period: 2018Q2
Fiscal Quarter: 2
Job Code: 5575
Office: 1080
Position Id: 800036

Frank Bochte works as a Investigator Iv-Oiig for Office Inspector General. Hired in 2013, they have about 5 years of service. Frank earned $26,673 in 2018.

Deborah Cohen

Investigator IV Financial/Office Inspector General

2018 total comp

$26,673

Base pay: $26,673
Overtime: $0
Other pay: $0
Benefits: $0
Total compensation: $26,673
Hire date: 2000-09-11

Source-specific fields

Employee Identifier: 7c757814-bf09-4f17-8368-9c518981ab32
Fiscal Period: 2018Q2
Fiscal Quarter: 2
Job Code: 149
Office: 1080
Position Id: 9701568

Deborah Cohen holds the role of Investigator IV Financial at Office Inspector General. They have served since 2000 (about 18 years). In 2018, their total compensation was $26,673.

Jorge Cerda

Investigator IV Financial/Office Inspector General

2018 total comp

$25,632

Base pay: $25,632
Overtime: $0
Other pay: $0
Benefits: $0
Total compensation: $25,632
Hire date: 2016-05-16

Source-specific fields

Employee Identifier: d987fe09-2fe2-4d96-902e-93cb29ac8083
Fiscal Period: 2018Q2
Fiscal Quarter: 2
Job Code: 149
Office: 1080
Position Id: 1100439

Jorge Cerda holds the role of Investigator IV Financial at Office Inspector General. Hired in 2016, they have about 2 years of service. In 2018, their total compensation was $25,632.

Steven Matteson

Investigator V/Office Inspector General

2017 total comp

$23,677

Base pay: $23,677
Overtime: $0
Other pay: $0
Benefits: $0
Total compensation: $23,677
Hire date: 2010-07-06
Middle name: T

Source-specific fields

Employee Identifier: 7d3e7bb8-7c29-46fe-8721-0b7d2fc50e28
Fiscal Period: 2017Q2
Fiscal Quarter: 2
Job Code: 642
Office: 1080
Position Id: 800035

Steven Matteson is a Investigator V at Office Inspector General. Their tenure dates to 2010, about 7 years. 2017 total compensation came to $23,677.

Courtney Kimble

Investigator Iv-Oiig/Office Inspector General

2016 total comp

$23,336

Base pay: $23,336
Overtime: $0
Other pay: $0
Benefits: $0
Total compensation: $23,336
Hire date: 2001-07-16

Source-specific fields

Employee Identifier: 1eae3259-6295-48a4-8fcd-0adc7e9f8bb6
Fiscal Period: 2016Q2
Fiscal Quarter: 2
Job Code: 5575
Office: 1080
Position Id: 800037

Courtney Kimble holds the role of Investigator Iv-Oiig at Office Inspector General. They have served since 2001 (about 15 years). In 2016, their total compensation was $23,336.

Thomas Galindo

Investigator III/Office Inspector General

2018 total comp

$23,314

Base pay: $23,314
Overtime: $0
Other pay: $0
Benefits: $0
Total compensation: $23,314
Hire date: 2011-07-18
Middle name: S

Source-specific fields

Employee Identifier: f5c51344-cd8d-4b62-8d90-f0b23134621d
Fiscal Period: 2018Q2
Fiscal Quarter: 2
Job Code: 150
Office: 1080
Position Id: 800033

At Office Inspector General, Thomas Galindo serves as a Investigator III. They have served since 2011 (about 7 years). Their 2018 pay totaled $23,314.

Christopher Duffin

Investigator III/Office Inspector General

2018 total comp

$22,853

Base pay: $22,853
Overtime: $0
Other pay: $0
Benefits: $0
Total compensation: $22,853
Hire date: 2014-11-03
Middle name: V

Source-specific fields

Employee Identifier: 7f586d5f-c69d-4d9f-9fde-fcdc5b7d2546
Fiscal Period: 2018Q2
Fiscal Quarter: 2
Job Code: 150
Office: 1080
Position Id: 800043

Christopher Duffin is a Investigator III at Office Inspector General. Hired in 2014, they have about 4 years of service. 2018 total compensation came to $22,853.