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Senior Wastewater Treatment Plant Operator

City of Casa Grande
Casa Grande, AZ Full Time
POSTED ON 3/9/2025
AVAILABLE BEFORE 5/8/2025

GENERAL PURPOSE:  Under general supervision, performs a variety of skilled work in the operation of a Wastewater (W/W) treatment plant and related equipment, and supervises staff.

PRIMARY DUTIES AND RESPONSIBILITIES:

The following duties ARE NOT intended to serve as a comprehensive list of all duties performed by all employees in this classification, only a representative summary of the primary duties and responsibilities. Incumbent(s) may not be required to perform all duties listed and may be required to perform additional, position-specific duties.

  • Operates pumps and W/W treatment equipment.
  • Monitors and inspects W/W plant operations; analyzes primary functionality and ancillary systems, and supervises and coordinates maintenance and repairs of plant systems and components.
  • Regulates flow of W/W through plant.
  • Reads gauges and maintains operating logs according to schedules.
  • Services pumps and motors, and maintains and repairs pumps, motors, valves, time clocks, meters, and other plant mechanical equipment; fabricates parts as needed.
  • Performs general building and grounds maintenance at the plant site.
  • Coordinates maintenance and repair of collection systems and lift stations; storm water lift stations, performs complex equipment repairs as required.
  • Monitors industrial and commercial W/W discharge and pre-treatment programs
  • Supervises staff and evaluates performance; monitors operations and reviews the work of assigned staff to assure the efficient and timely accomplishment of assigned duties and responsibilities.
  • Operator of record for Copper Mountain Ranch water company.
  • Completion of yearly reports for water company including Consumer Confidence Report to all regulatory agencies.
  • Responds to inquiries, complaints, and suggestions from the public and contractors regarding the WWRF, collections system, and water company.
  • Oversees the scheduling and prioritizing of work assignments; monitors status of work in progress and inspects completed work; coordinates projects and work activities with other divisions, departments, contractors, and utility companies, confers with assigned staff, assists with complex/problem situations, and provides technical expertise; oversees, coordinates and conducts training activities.
  • Oversees development, implementation, and project management of projects pertaining to the repair and improvement of City assets and infrastructure in the WWRF, collections system, and water company.
  • Helps in budgeting for yearly operations in the WWRF, collections system, and water company.
  • Helps in the development, management, and budgeting of Capital Improvement projects.
  • Responds to and supervises emergency situations.
  • Assists in formulating and implementing operational and procedural objectives and training programs for the wastewater facility, collections system, and water company.
  • Provides input into selection criteria for consultants and contractors conducting system construction, maintenance and repair projects; reviews and develop requests for proposals (RFP) and requests for quotes (RFQ) and requests for bids; recommends selection of consultants and contractors; oversees and coordinates work performed by contractors.
  • Prepares and implements short term programs and operational plans and provides input into long term operational and maintenance plans in the WWRF, collections system, and water company.
  • Oversees and monitors work of contractors; inspects work to ensure the safety of employees and other individuals.
  • Performs other duties as assigned or required. 

SUPERVISION EXERCISED: Maintenance workers and plant operator.



Education and Experience:

High School diploma or GED equivalent, and five (5) year’s W/W experience. 

Special Requirements: Possession of a Valid Arizona Drivers License; Grade 3 Wastewater Treatment Plant Operator’s certification, and treatment and collection certifications from the Arizona Department of Environmental Quality.


Necessary Knowledge and Skills:

  • Knowledge of City policies and procedures.
  • Knowledge of the principles and processes of W/W treatment.
  • Knowledge of the functions and servicing requirements of W/W plant machinery and equipment.
  • Knowledge of use, operation, calibration, and maintenance of a variety of specialized electronic monitoring equipment and control systems.
  • Knowledge of ordinances and regulations governing operations of wastewater treatment facilities, collections systems, and drinking water facilities.
  • Skill in training employees in the use of equipment and wastewater operations procedures and compliance regulations.
  • Skill in performing a variety of W/W treatment plant maintenance and operation activities.
  • Skill in supervision, coordinating staff, and delegating tasks and authority.
  • Skill in reading and understanding blueprints, technical documents and electrical schematics, and performing and verifying mathematical calculations.
  • Skill in keeping records and making reports.
  • Skill in establishing cooperative working relationships with employees and City staff.
  • Skill in following and effectively communicating verbal and written instructions.

Physical Demands / Work Environment:  Work is performed outdoors and W/W facilities.


Salary : $56,659 - $78,229

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