Salary : $158,537.60 - $191,214.40 Annually
Location : DA's Office - 1250 Main Street, Ste. 300 Napa, CA
Job Type: Full Time
Job Number:
Department: District Attorney
Opening Date: 07/10/2026
Closing Date: 8/10/2026 5:00 PM Pacific

The Position

The Supervising District Attorney Investigator plans, organizes, directs and supervises the activities of a unit engaged in conducting investigations on criminal and/or civil law matters; to conduct the more complex or sensitive investigations; and to act for the Chief District Attorney's Investigator in that person's absence.

The following duties are typical for this classification. Incumbents may not perform all of the listed duties and/or may be required to perform additional or different duties from those set forth below to address business needs and changing business practices.

Plan, organize, direct and supervise the activities of a unit engaged in conducting investigations on criminal and/or civil law matters; conduct the more complex or sensitive investigations either independently or as a member of a team; interview and take statements from witnesses and other individuals involved in assigned cases; may conduct administrative investigations of other staff; recommend and assist in the implementation of unit goals and objectives; implement policies and procedures; perform a variety of personnel actions including assisting with employee selections and promotions; conducting performance evaluations; and recommending disciplinary actions and dismissals; supervise investigative assignments; oversee work quality and effectiveness; review and evaluate case files and investigation reports for trial readiness; provide technical assistance to investigators conducting difficult investigations; supervise major crime investigations; consult with District Attorney and other attorneys concerning evidentiary matters and evaluation of witness testimony; confer with trial attorneys on strategy and presentation of evidence; review investigation reports for content and form; meet with staff regularly to discuss problems and to coordinate unit activities; serve as resource to staff and assist staff in making decisions; make recommendations on cases, program objectives and departmental operations and procedures; participate in establishing and developing departmental rules, policies and procedures; explain, interpret and implement departmental policies and procedures; conduct on-the-job training for less experienced investigators on laws, regulations and techniques regarding the collection of evidence, court presentations and the conduct of investigators; coordinate with the Chief District Attorney's Investigator on staffing needs, work flow and assignment distributions; maintain statistical records of amount and type of casework to input into workflow control and caseload management reports; provide assistance to other law enforcement agencies; may participate in meetings with community groups and other organizations relative to law enforcement functions and activities; answer questions and provide information to the public; investigate complaints and recommend corrective action as necessary to gain resolution; prepare reports on investigations and other correspondence as required; prepare statistical data requested by management staff; serve as the Chief District Attorney's Investigator in that person's absence; perform related duties as assigned.

This recruitment is being conducted to fill one full-time vacancy. The list established by this recruitment may also be used to fill current and future full-time, part-time, limited term, and extra help vacancies for up to one year.
POSITION REQUIREMENTS:
Any combination of education and experience that would likely provide the required knowledge, skills, and abilities is qualifying. A typical way to obtain the knowledge, skills, and abilities would be:

Experience:Ten years of current experience as a peace officer pursuant to California Penal Code Section 830.1, which includes criminal investigative experience. Supervisory experience is highly desired.

Education:
Equivalent to graduation from an accredited college or university with major course work in police science, criminology, public or business administration or closely related field. (Additional qualifying experience may be substituted for two years of the required education on a year-for-year basis.)

License or Certificate:*

• Possession of a valid California Driver's License.
• Possession of the California Peace Officers Standards and Training Intermediate Certificate or higher.

*Any license, certification, or registration required for this position shall be maintained (i.e. active and in good standing) at all times during employment with Napa County. For continued employment with Napa County, you must maintain such license, certification, or registration to meet the minimum
qualifications of this position.

Special Qualifications:Must be United States Citizen.

Other Skills:
Bilingual skills desirable.

RECRUITMENT AND SELECTION PROCESS:

Online Application DeadlineFriday August 10, 2026 at 5:00 pm PSTApplication Screening & Supplemental Question Scoring
Tentatively scheduled for the week August 10, 2026
Supplemental questions will be scored by subject matter experts. The most qualified applicants from the scoring of the supplemental questions will be invited for an Oral Exam Panel Interview.
Oral Exam Panel InterviewTentatively scheduled for the week of September 24, 2026

The most qualified candidates from the interview process will be placed on the eligibility list and may be considered for current and future vacancies for this position for up to one year.

Example of Duties

View the full job description including the example of duties for Supervising District Attorney Investigator

Benefits
Disaster Service Worker
Napa County employees automatically become Disaster Service Workers. This means that when Napa County experiences emergencies (earthquake, wildfire, power outage, etc.) you may be asked to pivot from your regular duties to provide critical services to those affected by the emergency (CA Govt Code § 3102).

Instructions for Supplemental Application Questions. The following questions comprise one of the steps in the selection process for this position and are intended to assist you in presenting your qualifications. Only the information you provide in your answers to these questions will be evaluated and scored to determine the best-qualified candidates to continue in the selection process for this position. Please be complete and specific in answering the questions, as your score will be based on this information. Applications submitted without responses to the supplemental questions will not be evaluated. Although your experience and education should relate to your application, your application and or resume will not be reviewed when scoring the supplemental questions. Therefore, please be as detailed as possible in your responses to the supplemental questions. I have read and understand the instructions presented above.

• Yes
• No

02

A current California P.O.S.T. Intermediate Certificate (or higher) is a mandatory qualification for this position. No substitutions or exceptions are allowed. Please indicate the highest level of current California P.O.S.T. certificate you possess:

• Intermediate
• Advanced
• Supervisor
• Management
• Executive

03

To qualify for this position, it will be necessary for you to agree to an extensive P.O.S.T. background investigation that includes criminal history, drug and alcohol use, financial history, contacts with current and prior employers, and interviews with friends, neighbors, etc., as well as a psychological evaluation and medical examination. Do you agree to participate in the background investigation process?

• Yes
• No

04

Do you have at least ten years of experience as a peace officer (pursuant to California Penal Code Section 830.1), including assignments in patrol and investigations?

• Yes
• No

05

Have you worked as a peace officer (pursuant to California Penal Code Section 830.1) in the last 36 months?

• Yes
• No

06

Describe your investigative experience. Include the agency, assignment or position in which you gained that experience, the primary types of investigations you conducted, your role (e.g., case investigator, lead investigator, supervisor, or acting supervisor), and any experience investigating homicides or officer-involved shootings.
07

Describe your supervisory experience, including any acting supervisory assignments. For each assignment, include the agency or employer, job title, dates served, number and classifications (e.g., sworn, professional) of employees supervised, and your primary areas of responsibility.
08

Describe your experience performing administrative and operational supervisory functions, such as personnel management, performance evaluations, employee mentoring, discipline, hiring, scheduling, workload management, investigative case management, policy development, and training. Include your role and the approximate dates you performed these duties.
09

Describe any formal leadership, supervisory, or management training you have completed. Include the course title, sponsoring agency or organization, completion date, and any relevant certification earned.
Required Question