We continually strive for a workforce that reflects the growing diversity within the State of Illinois. A variety of employee backgrounds, perspectives, ideas and experiences are crucial to our ability to most effectively serve the public. Bilingual skills welcome

Reasonable Accommodation Statement

The State of Illinois is committed to working with and providing reasonable accommodations to people with disabilities. Further, federal law requires employers to provide reasonable accommodation to qualified individuals with disabilities. Please tell us if you require a reasonable accommodation to apply for a job, interview for a job, or for any other activity related to the hiring process. Examples of reasonable accommodation include, but are not limited to, making a change to the application process (if possible), providing documents in an alternate format, using a sign language interpreter, or using specialized equipment.

To be provided a Reasonable Accommodation during the hiring process, you will need to provide a certification of disability from a physician, psychiatrist, school official or an Illinois Department of Human Services (DHS) Division of Rehabilitation Services (DRS) Vocational Rehabilitation (VR) Counselor. Supporting documentation should be uploaded under My Documents → Additional Documents section for each application.

Any questions on Reasonable Accommodations can be directed to Central Management Services Disability Resource Center at or call (217) 524-7514 for further information and to request or discuss an accommodation.

Sponsorship for Employment

The State of Illinois does not provide sponsorship for employment visa status (e.g. H-1B visa status). To be considered for permanent employment with the State of Illinois, applicants must be currently authorized to work in the United States on a full-time basis.

Disclosure of Salary Information

In compliance with the Illinois Equal Pay Act, 820 ILCS 112/1 et seq., the State does not seek, request, or require a job applicant’s wage or salary history.  Employment decisions are not made based on an applicant’s wage or salary history.  To that end, please do not include wage or salary information in your resume or other profile or application materials.

Date:  Nov 16, 2023

Marion, IL, US, 62959

Job Requisition ID:  33272

Agency:  Department of Corrections

Opening Date/Time: 11/17/2023 12:00 A.M
Closing Date/Time:  12/04/2023 11:59 P.M 
Salary:  Anticipated Starting Salary Range: $6,828 - $7,366/Month 
Job Type:  Salaried Full Time 
County:  Williamson 
Number of Vacancies:  1 
Plan/BU:  Confidential Exclusion 090 


Posting Identification Number 33272


****************A RESUME IS REQUIRED FOR THIS JOB POSTING****************

Please attach a DETAILED Resume/Curriculum Vitae (CV) to the MY DOCUMENTS section of your application. You WILL NOT be considered for the position if you attach a CMS100, CMS100b or any other document that is not a Resume or CV.

Position Overview

The Internal Security Investigator position serves as a lead investigator of incidents and complaints of administrative and criminal nature for various areas and agencies. This covers all facilities and their satellite facilities, along with juvenile facilities, and parole offices. The ideal candidate should be able to interview individuals in custody, employees, and management staff to solve and gather facts to conclude cases in a timely manner. We encourage all qualified individuals to apply.

Job Responsibilities

  1. Conducts investigations involving highly responsible and confidential cases regarding alleged violations of security threats, Department Rules or Administrative Directives or criminal offenses by individuals in custody, agency/staff, students, or parolees.
  2. Interviews persons and compiles pertinent investigation data and information to be analyzed and forwarded for administrative action or inclusion in the Corrections Intelligence Database.
  3. Writes comprehensive reports identifying the facts and findings in investigations and reviews all reports for clarity, accuracy, and completeness prior to submittal to the Internal Investigations Unit Supervisor.
  4. Keeps a chronological log of cases assigned to be investigated for periodic review by Unit Supervisor.
  5. Serves as liaison with other Department of Corrections Investigators, State's Attorneys, federal, in-state, out-of-state and local law enforcement agencies.
  6. Performs other duties as required or assigned, which are reasonably within the scope of the duties enumerated above.

Minimum Qualifications

  1. Requires knowledge, skill, and mental development equivalent to completion of two (2) years of college, with coursework in law, government, liberal arts, history or business or public administration, plus four (4) years professional experience in law enforcement investigatory work or a related field.


Requires knowledge, skill, and mental development equivalent to completion of four (4) years college, with major coursework in law, government, liberal arts, history or business or public administration, plus two (2) years professional experience in law enforcement investigatory work or a related field.


Requires knowledge, skill, and mental development equivalent to completion of a master’s degree, with major course work in law, government, liberal arts, history or business or public administration plus one (1) year professional experience in law enforcement investigatory work or a related field.


     Requires completion of the F.B.I. National Academy or comparable law enforcement schooling, plus two (2) years of professional experience in law enforcement investigatory work or a related field.

Preferred Qualifications (In Order of Significance)

  1. Prefers at least three (3) years of experience conducting investigations, including interviewing persons, gathering, and compiling pertinent investigative/information data.
  2. Prefers at least three (3) years of experience recognizing and gathering appropriate statements, exhibits and materials acceptable for use in prosecution of cases or disciplinary actions.
  3. Prefers at least three (3) years of experience working in a correctional setting.
  4. Prefers at least three (3) experience preparing case reports for referral (submitted to States Attorney or facility administrator).
  5. Prefers at least three (3) years of experience interpreting and applying State statutes, rules and regulations concerning conflict of interest of malfeasance of office.
  6. Prefers at least three (3) years of experience in the processing of crime scenes and the identification, collection, and handling of evidence.
  7. Prefers at least one (1) year of experience submitting cases and testifying in court.
  8. Prefers experience using Microsoft Word, Excel, and Outlook, or similar software.

Conditions of Employment

  1. Requires possession of an active Firearm Owners Identification (FOID) card and must maintain active status while in the position.
  2. Requires the ability to qualify with firearms prior to the completion of the initial pre-service training curriculum and annually thereafter in accordance with agency directive and state or federal laws.
  3. Requires valid, appropriate State issued driver's license, and the ability to travel statewide.
  4. Reauires ability to be on-call within the investigations Unit.
  5. Requires ability to pass the IDOC/IDJJ background check.
  6. Requires ability to pass a drug screen. The use of unauthorized drugs by an employee, regardless of position held, is prohibited.
  7. Applicants are required to abide by all vaccine and/or other medical standards as set out by the employer. 


The conditions of employment listed here are incorporated and related to any of the job duties as listed in the job description.

About The Agency

The Illinois Department of Corrections is a multicultural agency deeply committed to ensuring diversity, equity, and inclusion.  This commitment is at the forefront of our operations, hiring, policies and procedures, and training. We recognize the benefit of workplace empowerment, the importance of diversity and fully support an environment where ALL employees are treated fairly, respectfully, and have equal access to opportunities and resources necessary to thrive and contribute to the agency’s success. IDOC genuinely values the differences of individuals in our custody and is committed to ensuring a healthy living environment where they feel valued, respected, and included.


Through our commitment to Diversity, Equity, and Inclusion (DEI), we shall establish and uphold agency policies and practices conducive to eliminating all forms of exclusion including, but not limited to, racism, ageism, ableism, sexism, discrimination based on sexual orientation and gender, and religious oppression.


The IDOC team works to serve justice in Illinois and increase public safety by promoting positive change in behavior of individuals in custody, operating successful reentry programs, and reducing victimization.


Employees enjoy excellent benefits, including health, vision, and dental insurance; retirement plan and deferred compensation; state holidays and other benefit time off; and pre-tax benefit programs. The department also offers extensive training and career advancement opportunities.


The Illinois Department of Corrections is proud to be an Equal Opportunity Employer. 

Work Hours:  8 AM - 4 PM, Monday - Friday, S/S off 
Work Location: 2309 W Main St Marion, IL 62959-1187 
Agency Contact:

Job Family: Public Safety 


Agency statement


The main form of communication will be through email. Please check your “junk mail”, “spam”, or “other” folder for communication(s) regarding any submitted application(s). You may receive emails from the following addresses:


Nearest Major Market: Carbondale