Plant Operator I/II
$4.87K - $6.21K/mo
SUPERVISION RECEIVED AND EXERCISED Receives general direction from the Senior Plant Operator or a ... Keeps logs and records of water samples and machinery operation. Ensures adherence to all health ...
$4.87K - $6.21K/mo
SUPERVISION RECEIVED AND EXERCISED Receives general direction from the Senior Plant Operator or a ... Keeps logs and records of water samples and machinery operation. Ensures adherence to all health ...
$4.87K - $6.21K/mo
SUPERVISION RECEIVED AND EXERCISED Receives general direction from the Senior Plant Operator or a ... Keeps logs and records of water samples and machinery operation. Ensures adherence to all health ...
Mariposa, CA · On-site
$4.87K - $6.21K/mo
SUPERVISION RECEIVED AND EXERCISED Receives general direction from the Senior Plant Operator or a ... Keeps logs and records of water samples and machinery operation. Ensures adherence to all health ...
Mariposa, CA · On-site
$4.87K - $6.21K/mo
SUPERVISION RECEIVED AND EXERCISED Receives general direction from the Senior Plant Operator or a ... Keeps logs and records of water samples and machinery operation. Ensures adherence to all health ...
$26.4K - $39.7K
14% of jobs
$46.3K is the 25th percentile. Wages below this are outliers.
$39.7K - $53K
22% of jobs
$53K - $66.3K
9% of jobs
The median wage is $75.8K / yr.
$66.3K - $79.6K
7% of jobs
$79.6K - $92.9K
12% of jobs
$103.6K is the 75th percentile. Wages above this are outliers.
$92.9K - $106.2K
14% of jobs
$106.2K - $119.5K
9% of jobs
$119.5K - $132.8K
4% of jobs
$132.8K - $146.1K
3% of jobs
$146.1K - $159.4K
4% of jobs
$159.4K - $172.7K
2% of jobs
$26.4K
$84.8K
$172.7K
| Aspect | Senior Machine Operator | Machine Operator |
|---|---|---|
| Credentials | Typically requires more experience and sometimes certifications in specific machinery | Basic machine operation certifications or training |
| Work Environment | Oversees complex machinery, may supervise others | Operates machinery under supervision or standard procedures |
| Responsibilities | Maintains, troubleshoots, and optimizes equipment; mentors junior staff | Performs routine machine operation tasks |
The main difference between a Senior Machine Operator and a Machine Operator lies in experience, responsibilities, and leadership. Senior Machine Operators handle more complex tasks, oversee equipment, and often mentor others, whereas Machine Operators focus on routine operation. Both roles require relevant certifications, but the senior position demands more expertise and experience.

Description There is currently one (1) full-time vacancy in the Public Works Department. Only online applications will be accepted. DEFINITION To plan, coordinate, and participate in the safe and sanitary maintenance and operation of County special districts facilities, including water and wastewater systems; to ensure State and County compliance with related laws, regulations and standards; and to perform related duties and responsibilities as required.
DISTINGUISHING CHARACTERISTICS The Plant Operator I/II is a flexibly-staffed class series. Positions allocated to the I/II level are normally filled at the I level. Advancement from the I to the II level is at the discretion of the appointing authority, provided that the incumbent meets the minimum qualifications and demonstrates the ability to independently perform the full scope of the assigned duties.
Incumbents in the Plant Operator I level usually perform most of the duties required of the position at the Plant Operator II level, but are not expected to function with the same amount of knowledge or skill level. Assignments are limited in scope and are performed within a framework of established procedures with close supervision. The Plant Operator II is the journey level classification in the Plant Operator series.
Incumbents are expected to complete assignments with minimal supervision and are given increased responsibility and latitude of judgment to complete assignments. SUPERVISION RECEIVED AND EXERCISED Receives general direction from the Senior Plant Operator or a higher level management position. Examples of Duties EXAMPLES OF ESSENTIAL FUNCTIONS Depending upon assignment, duties may include, but are not limited to, the following: Monitors the various instruments and general mechanical equipment involved in the operation of a water and wastewater treatment plant; takes appropriate action to remedy adverse situations.
Take readings of gauges and temperatures and record readings. Read meters and gauges and regulate the flow of water and wastewater. Test the treatment process for dissolved oxygen levels, pH and temperature.
Performs engineering calculations such as determine chemical dosage requirements and pump sizing. Inspect plant facilities and related areas to ensure proper appearance and to determine maintenance, improvement and repair needs. Provides advice and recommendations to supervisor regarding facilities; provides technical guidance and direction to employees in maintenance work methods, materials, standards and operations.
Keeps logs and records of water samples and machinery operation. Ensures adherence to all health and safety standards. Receives and responds to inquiries, requests for assistance, concerns and complaints regarding plant policies, programs and projects.
Performs related duties as assigned. Minimum Qualifications Education: High school or GED equivalency is required. Experience: Increasingly responsible experience in facilities maintenance or a related field that would provide the required knowledge, skills, and abilities is qualifying.
Additional Requirements: Plant Operator I Enrollment in certification-required education courses necessary to sit for the certification exam and the ability to obtain a Grade I Wastewater Treatment Plant Operator certificate or Grade I Water Treatment Operator (T1) certificate within eighteen (18) months of appointment. Plant Operator II Possession of a Grade II Wastewater Treatment Plant Operator certificate, a Grade I Water Treatment Operator (T1), and a Grade I Water Distribution Operator (D1) certificate issued by the State of California. Plant Operator I and II Possession of a valid California driver's license.
Under certain circumstances, the Human Resources Director may accept a valid driver's license from another State if applicant acknowledges his/her intent to acquire a California driver's license within three months by signing an acknowledgement form.
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Public administration
201 - 500 Employees
Mariposa, CA, US
1850