Investigator III

  • Investigator III
  • What will I be doing?
  • Do I qualify?
  • Can I be successful?
  • Benefits
  • How do I apply?
Class Number: 
Exam Components: 
Rating of Education & Experience, 100%
Annual Salary Range:
$38,928.00 – $55,416.00
Twice-a-Month Salary Range:
$1,622.00 – $2,309.00
Pay Grade: 

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This is senior-level supervisory, administrative, and specialized investigative work in a State agency.

Job Duties

Directs, trains, and evaluates investigative staff assigned to a regional investigative office, or serves as the overall assistant in a statewide investigative program.

Coordinates and oversees assigned staff investigations; provides direction and consultative assistance in the development, conduct, and completion of investigations.

Directs, or participates in, complex and/or highly sensitive internal and external criminal, civil, administrative, or environmental field investigations.

Conducts assigned investigations; locates, interviews, and prepares statements from victims, witnesses, and suspects; collects and evaluates pertinent records; obtains and prepares evidence; prepares detailed investigative reports; and provides testimony in criminal, civil, or administrative proceedings.

Conducts or oversees assigned internal investigations involving suspected misconduct, misfeasance, malfeasance, or abuse of programs or policies by staff.

Coordinates program activities with staff, law enforcement agencies, prosecuting attorneys' offices, and other governmental entities in the conduct of investigative and surveillance activities, and identifies and addresses concerns within the assigned region or area.

Reviews and/or prepares reports concerning case status, investigative findings, and recommendations for submission to administrative superiors.

Conducts statistical analysis of investigative trends/data and prepares reports of findings.

Coordinates and participates in surveillance operations, evidence procurement, recruitment of informants, witness identification, and case preparation.

Provides testimony in criminal, civil, or administrative proceedings.

Conducts subpoena conferences; prepares and executes search warrants.

Oversees the collection, documentation, and preservation of evidence; and ensures adherence to chain of custody standards.

Supervises the investigation of background information on licensees, service contractors, and applicants.

Exercises considerable independence and initiative in the performance of responsibilities; receives general administrative direction.

Performs other related duties as assigned.

Areas of Interest: 
Social Service, Public Welfare & Mental Health

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(The following requirements will determine merit system eligibility, experience and education ratings, and may be used to evaluate applicants for Missouri Uniform Classification and Pay System positions not requiring selection from merit registers. When practical and possible, the Division of Personnel will accept substitution of experience and education on a year-for-year basis.)

One or more years of experience as an Investigator II with the Missouri Uniform Classification and Pay System; and possession of a high school diploma or proof of high school equivalency.


Bachelor's degree from an accredited college or university with a minimum of 15 earned credit hours in one or a combination of the following: Criminal Justice, Law Enforcement, Criminology, Business Administration, social sciences, environmental sciences, or a closely related field; and,

Three or more years of civil, administrative, or criminal investigative (non-clerical) experience (e.g., tax fraud, licensing, environmental, client care, public assistance, insurance, or military); or experience as a law enforcement officer with responsibility for conducting investigations.

(24 earned graduate credit hours from an accredited college or university may substitute for a maximum of one year of the required experience.)

(Additional qualifying experience may substitute on a year-for-year basis for deficiencies in the required college education.)

Please note that documentation that supports your eligibility (i.e. transcripts, employment records, etc.) may be required at any time during the application and hiring process. If you do not possess the minimum qualifications, please consider one of many other employment opportunities with the State of Missouri.

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Key Skills

Do you possess the key skills which are considered essential for successful employment in this classification?

Comprehensive knowledge of investigative and interviewing techniques and procedures, including effective methods of obtaining information from hostile or reluctant witnesses.

Comprehensive knowledge of state and federal laws, regulations, policies, and procedures applicable to the programs administered by the agency.

Comprehensive knowledge of sources of information to be utilized in obtaining evidence and documentation, and the principles of identification, preservation, and presentation of evidence.

Comprehensive knowledge of the procedural requirements and differences of administrative, criminal, and civil cases.

Comprehensive knowledge of the legal rights of victims, witnesses, and suspects involved in an investigation process.

Comprehensive knowledge of the use of expert witnesses and informants in the preparation of criminal cases.

Comprehensive knowledge of the principles of training, supervision, and management.

Ability to communicate effectively.

Ability to prepare and present testimony and evidence to prosecutors, administrative review boards, grand juries, and court officials.

Ability to prepare clear and detailed reports, and review the reports of lower level staff.

Ability to interpret laws, policies, and procedures pertaining to civil, criminal, and administrative investigations.

Ability to establish and maintain effective working relationships with staff; federal, state, and local agencies; business entities, law enforcement officials, prosecutors, witnesses, and the general public.

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The following link will provide you with general information about State of Missouri employee benefits.

View benefits

View Class Specification Document