Range Explanation:
Hiring Range is an estimate of where you can receive an offer. The actual salary offer will carefully consider a wide range of factors, including your skills, qualifications, experience, education, licenses, training, and internal equity.
Pay Range is the entire compensation range for the position.
The first review of applications will be on 07/17/2026 .
Pima County Regional Wastewater Department is seeking three Operations and Maintenance Technicians III (O&M) to join the team. O&M Technician III is responsible for safely operating and monitoring selected equipment involved in the treatment, processing, and resource reclamation of wastewater and biosolids.
In this role, you will ensure the continuity of wastewater treatment operations by performing preventive maintenance and adjustments to equipment and systems, including pumps, motors, blowers, chemical feed equipment, sludge equipment, and basic laboratory equipment. This position is also responsible for collecting and analyzing wastewater samples and recording data relating to the operations and maintenance of equipment and treatment processes.
Work assignments, shifts, and locations will vary depending on the department's needs and will be communicated to the incumbent by the supervisor/treatment management.
Essential Functions:
As defined under the Americans with Disabilities Act, this classification may include any of the following tasks, knowledge, skills, and other characteristics. This list is ILLUSTRATIVE ONLY and is not a comprehensive listing of all functions and tasks performed by incumbents of this class. Work assignments may vary depending on the department’s needs and will be communicated to the applicant or incumbent by the supervisor.
O&M Technician III is expected to perform all duties and responsibilities of the O&M Technician - Level I and Level II; Follows all safety procedures, including proper lockout/tagout (LOTO) and confined space procedures; Operates and trains staff on new and advanced wastewater and solids treatment processing equipment and systems; Uses advanced operating principles of facility Supervisory Control and Data Acquisition (SCADA) systems and computerized maintenance management systems; Uses intermediate level algebra and other mathematical
calculations; Collects and analyzes wastewater samples in field and laboratory settings, reports results; Interprets readings on metering/process control devices and testing/analysis results, and adjusts equipment and machinery operations as necessary; Evaluates, troubleshoots, and adjusts all equipment and processes involved in the treatment and processing of wastewater and its byproducts, including solids, gas, service water, and side streams; Makes process control recommendations to the Supervisor and/or management team based on
field observations and laboratory results; Prepares for and responds to process and equipment changes when placing equipment into or out of service, hydraulic loading events, and other plant emergencies; Assists with data table/spreadsheet creation &/or modification; Assists in performing most duties of O&M Supervisors, including conducting tours of facilities; Assist in generating daily, weekly, and monthly plant highlight reports or other reports to management; Performs QA/QC on lab processes and data; Maintains a safe, clean, and
orderly work environment.
Minimum Qualifications:
- High school diploma or General Educational Development (GED) equivalency, a valid Arizona Department of Environmental Quality (ADEQ) Grade 3 (or higher) Wastewater Treatment System Operator certification, at least 3 years of experience in the operation of an advanced, complex wastewater/water facility or related industry/facility with at least 2 years as an operator at a Grade 3 or 4 wastewater facility ( Section R18-5-114).
- (Relevant experience, training, and/or education from an accredited college or university may be substituted for experience.)
- Qualifying education and experience must be clearly documented in the "Education" and "Work Experience" sections of the application. Do not substitute a resume for your application or write "see resume" on your application.
- Preferred Qualifications: (Be specific in describing your experience in your application. Ensure the descriptions provided illustrate your competencies, specifically addressing the required and preferred qualifications.)
- Minimum three ( 3) years experience performing preventative maintenance at a water/wastewater facility or similar.
- Additional ADEQ Certification/s (Collections/Water Treatment/Water Distribution).
- Minimum three ( 3) years experience with Supervisory Controls and Data Acquisition (SCADA) or comparable system control operation software.
- Minimum two ( 2) years as an O&M Technician with Pima County Wastewater Reclamation Department.
- Minimum two ( 2) years experience assisting with facility on-the-job training (OJT).
- Selection Procedure : Pima County Human Resources Department reserves the right to admit to the selection process only those candidates that meet the minimum qualifications. All applications will be assessed based on an evaluation of the listed education and experience. Candidates meeting the minimum qualifications may be further evaluated/scored against any advertised Preferred Qualifications. The hiring authority will interview and select the successful candidate from a referral list provided by Human Resources. Additional assessments/testing may be required as part of the selection process .
- Supplemental Information : Licenses and Certificates : Valid driver license is required at time of application. Valid AZ driver license is required at time of appointment. The successful applicant will be subject to a 39-month DOT Motor Vehicle Record review to determine applicant’s suitability to operate county vehicles in accordance with Pima County administrative procedures. Failure to obtain and maintain the required licenses and certifications shall be grounds for termination. Any offer of employment resulting from this recruitment is contingent upon Fleet Services’ review and approval of the candidate’s driving record. Failure to obtain/maintain the required certification/licensures shall be grounds for termination. All positions require a valid Arizona Department of Environmental Quality (ADEQ) Grade 3 Wastewater Treatment System Operator certification. If an applicant has an equivalent certification from another state, certification through reciprocity with ADEQ must be obtained within 3 months of hire or promotion.
