Wastewater Systems Worker Trainee​/I​/II​/III

The Wastewater Utilities Division within the Public Works Department is seeking professional individuals who can perform as Wastewater Systems Workers at the Trainee, I, II, or III levels. The ideal candidate will have experience operating advanced wastewater treatment systems and sewer collections systems and be able to make operational decisions appropriate for the position level. The ideal candidate will also possess strong collaboration, communication, and organizational skills, a high level of initiative, and a passion for public service.

The position requires commitment to workplace safety activities, practices, and standards. We seek someone who works effectively in a teamwork environment, holds themselves and others to the highest degree of accountability and integrity, and can work on different wastewater collection and treatment systems throughout the County, adjusting quickly to changing job priorities with a positive attitude.

The position will be assigned primarily to wastewater collection system tasks and projects, including operation and maintenance of lift stations, pumps, sewer collection lines, and other infrastructure, as well as performing spill response and other related duties. Candidates with a California Water Environment Association (CWEA) Collection System Maintenance Certification are highly preferred.

For more information regarding the Public Works Department, please visit our website at Public Works - County of San Luis Obispo.

for the detailed job description for Wastewater Systems Worker Trainee.

for the detailed job description for Wastewater Systems Worker I.

for the detailed job description for Wastewater Systems Worker II.

for the detailed job description for Wastewater Systems Worker III.

This recruitment may be used to fill future permanent, substitute, limited term, and temporary positions, both full-time and part-time throughout the County.

Education and Experience

All levels:
Graduation from high school or possession of a general educational development (GED) certificate.

Wastewater Systems Worker Trainee:
No experience required

Wastewater Systems Worker I:
One year of qualifying experience as a wastewater treatment plant operator or equivalent in accordance with the SWRCB (Chapter 26, Title 23 of the California Code of Regulations).

Wastewater Systems Worker II:
Two years of experience as Wastewater Systems Worker I or equivalent in accordance with the SWRCB (Chapter 26, Title 23 of the California Code of Regulations).

Wastewater Systems Worker III:
Three years of experience as a Wastewater Systems Worker II or equivalent in accordance with the SWRCB (Chapter 26, Title 23 of the California Code of Regulations).

Applications, including answers to supplemental questions, must be submitted online by the final filing date. Apply for this position at  Most County recruitments require you to respond to supplemental questions as part of the application process. We recommend that you review these questions prior to beginning your application.

An initial application review will be conducted. Candidates who meet the minimum qualifications and are best qualified will be invited to participate in selection activities which may include online assessments, performance exams, written exams, and interviews. Final candidates will be required to have an in-depth background review performed before proceeding in the process. Please note that references will not be contacted until the end of the process.

If you have questions or would like to discuss the opportunity further, please contact Human Resources at  Confidential inquiries are welcomed. For further information regarding the County of San Luis Obispo, visit our website at