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Water Operator Trainee Jobs in California (NOW HIRING)

Calpine

Power Operations Trainee

Middletown, CA · On-site

$28.50 - $32.32/hr

Performs the necessary operating, regulating and adjusting duties to maintain proper output of the generating units, proper water flows, pressures, temperatures draft conditions and fuel consumption.

Calpine

Power Operations Trainee

Middletown, CA · On-site

$28.50 - $32.32/hr

Performs the necessary operating, regulating and adjusting duties to maintain proper output of the generating units, proper water flows, pressures, temperatures draft conditions and fuel consumption.

Calpine

Power Operations Trainee

Middletown, CA · On-site

$28.50 - $32.32/hr

Performs the necessary operating, regulating and adjusting duties to maintain proper output of the generating units, proper water flows, pressures, temperatures draft conditions and fuel consumption.

Calpine

Power Operations Trainee (IC&E)

San Diego, CA · On-site

$32.77 - $34.90/hr

Performs the necessary operating, regulating and adjusting duties to maintain proper output of the generating units, proper water flows, pressures, temperatures draft conditions and fuel consumption.

Calpine

Power Operations Trainee (IC&E)

San Diego, CA · On-site

$32.77 - $34.90/hr

Performs the necessary operating, regulating and adjusting duties to maintain proper output of the generating units, proper water flows, pressures, temperatures draft conditions and fuel consumption.

County of Los Angeles, CA

PLUMBER

Los Angeles, CA · On-site

$109K/yr

... trainee, and is fully qualified and able to perform a specific trade without supervision. E.g ... A State of California Fire Extinguisher Test Certificate, and a Grade II Water Treatment Operator ...

County of Los Angeles

PLUMBER

Los Angeles, CA · On-site

$109K/yr

... trainee, and is fully qualified and able to perform a specific trade without supervision. E.g ... A State of California Fire Extinguisher Test Certificate, and a Grade II Water Treatment Operator ...

Orange County Fire Authority

Fire Captain

Irvine, CA · On-site

$106K - $143K/yr

Qualifying experience as a Firefighter begins at time of hire as either a Firefighter Trainee or ... Driver/Operator Water Tender LICENSES: Possession of a valid Class C Driver License at time of ...

Orange County Fire Authority, CA

Fire Captain

Irvine, CA · On-site

$106K - $143K/yr

... Driver/Operator Water Tender LICENSES: Possession of a valid Class C Driver License at time of ... Firefighter Trainees and Handcrew Firefighters do not participate in this benefit. OCPFA ...

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All JobsWater Operator JobsWater Operator Trainee JobsWater Operator Trainee Jobs in California

Water Operator Trainee information

See California salary details

$25.2K

$43K

$62.7K

How much do water operator trainee jobs pay per year?

As of Sep 12, 2026, the average yearly pay for water operator trainee in California is $42,960.00, according to ZipRecruiter salary data. Most workers in this role earn between $32,600.00 and $50,300.00 per year, depending on experience, location, and employer.

What is a water operator trainee?

Water Operator Trainees are entry-level professionals who assist in the operation and maintenance of water treatment facilities. They work under the supervision of certified water operators to learn how to monitor, test, and ensure the quality and safety of public water supplies. Their responsibilities often include collecting water samples, recording data, performing basic laboratory tests, and learning about regulatory compliance. This role is designed to provide hands-on experience and training required to become a licensed water operator.

What are the key skills and qualifications needed to thrive as a water operator trainee?

To thrive as a Water Operator Trainee, you need basic math, science knowledge, mechanical aptitude, and a high school diploma or equivalent. Familiarity with water treatment equipment, monitoring systems, and the pursuit of a state-issued water operator certification are typically required. Strong attention to detail, problem-solving, and teamwork skills help you excel in monitoring and maintaining water quality standards. These competencies ensure safe, efficient operation of water facilities and compliance with regulatory requirements.

What are some common challenges faced by water operator trainees during their initial training period?

Water Operator Trainees often face challenges such as adapting to the technical complexity of water treatment systems, learning to accurately monitor and adjust equipment, and understanding strict safety and regulatory requirements. Trainees must quickly become familiar with both manual and automated processes, as well as handle emergency situations like equipment malfunctions or water quality concerns. Support from experienced operators and ongoing hands-on training are key to overcoming these hurdles and building competence in the role.

What is the difference between Water Operator Trainee vs Water Operator?

AspectWater Operator TraineeWater Operator
CertificationsTypically requires a high school diploma and may need a state-specific water treatment or distribution certificationRequires a valid water treatment or distribution certification, often obtained after training
Work EnvironmentSupervised, entry-level role in water treatment plants or distribution systemsFull responsibilities in operating, maintaining, and monitoring water systems
Job ResponsibilitiesAssisting with daily operations, learning procedures, and gaining experiencePerforming routine maintenance, monitoring equipment, and ensuring water quality

The main difference between a Water Operator Trainee and a Water Operator is experience and certification level. Trainees are in learning roles, often requiring supervision, while Water Operators have completed necessary certifications and handle full operational duties independently.

Are water operator trainees in high demand?

Water operator trainees are in steady demand due to ongoing needs for water treatment and distribution, especially as many facilities seek to meet regulatory standards. The role often requires certifications and technical skills, and employment opportunities are generally stable in the water utility industry.

Is being a water operator trainee worth it?

A water operator trainee position provides hands-on experience in water treatment and distribution, often serving as a stepping stone to certification and full licensing. It offers practical skills, knowledge of safety protocols, and job stability, making it a valuable entry-level role in the water industry.

What are the most commonly searched types of Water Operator jobs in California?

The most popular types of Water Operator jobs in California are:

What are popular job titles related to Water Operator Trainee jobs in California?

For Water Operator Trainee jobs in California, the most frequently searched job titles are:

What job categories do people searching Water Operator Trainee jobs in California look for?

The top searched job categories for Water Operator Trainee jobs in California are:

What cities in California are hiring for Water Operator Trainee jobs?

Cities in California with the most Water Operator Trainee job openings:

Water Operator Trainee jobs near you
Infographic showing various Water Operator Trainee job openings in California as of September 2026, with employment types broken down into 93% Full Time, and 7% Part Time. Highlights an 96% In-person, 2% Hybrid, and 2% Remote job distribution, with an average salary of $42,960 per year, or $20.7 per hour.

Power Operations Trainee

Middletown, CA • On-site

Calpine
Utilities • 1 - 5K employees
Learn more about Calpineexternal

$28.50 - $32.32/hr

Full-time

Re-posted 3 days ago

Calpine rating

8.7

Company rating: 8.7 out of 10

Based on 10 frontline employees who took The Breakroom Quiz

Job description

Calpine, a business unit of Constellation Energy Corporation (Nasdaq: CEG), is America's largest generator of electricity from natural gas and geothermal resources with operations in competitive power markets. With 79 energy facilities in operation, Calpine’s fleet has the capacity to generate approximately 27,000 MW of electricity – enough to power approximately 27 million homes. Through wholesale power operations and its retail businesses, Calpine serves customers in 22 states and Canada. Its clean, efficient, modern and flexible fleet uses advanced technologies to generate power in a low-carbon and environmentally responsible manner.

The company was established on the premise that a strong commitment to the environment is inextricably linked to excellence in power generation and corporate responsibility. Since its founding in 1984, Calpine has led the power industry in its unwavering commitment to environmental stewardship. In addition, its renewable geothermal plants use steam generated deep below the earth's surface to produce clean, renewable electricity.

Job Summary: (includes but is not limited to the following, other duties may be assigned)

Assists in the operation of plant equipment, starts and stops pumps and auxiliary equipment, checks and ensures proper lubrication and cooling on all pumps, motors, fans compressors, etc. Takes and records plant operational data. Inspects plant equipment for faulty operations. Will assist in performing a variety of plant maintenance tasks including diagnosis, maintenance and repair of mechanical and electrical equipment in a safe, efficient and economical manner. Position will perform routine trouble shooting activities, such as maintaining, calibrating and repairing plant electrical, instrumentation, and control systems; operates and monitor equipment to optimize unit performance. Performs the necessary operating, regulating and adjusting duties to maintain proper output of the generating units, proper water flows, pressures, temperatures draft conditions and fuel consumption. Maintains operational/training logs to ensure understanding of assigned job. Assists in the operation of turbine/generator equipment including synchronization of units. May assists in the closing and opening of switchyard circuit breakers and associated disconnects per switching orders. Assists in making the necessary adjustments to maintain generator voltages and unit power factor. This position will also assist in ensuring compliance with all local, State and Federal regulations and plant procedures and is responsible for maintaining a safe work environment and contributes to operating procedures to ensure consistent and safe operations. Performs related work as required.

Job Requirements

  • Requires a High School Diploma, degree from technical/vocational school or equivalent.
  • Requires zero to four years of related experience.
  • Prefer some previous experience using test equipment and calibration appliances. Additional experience with machinery repair and control systems preferred.

Salary Information

  • Range - $28.50-$32.32/ hour

Additional Calpine Information:

  • Equal Opportunity Employer of Minorities, Females, Protected Veterans, and Individuals with Disabilities.
  • Calpine is committed to Equal Employment Opportunity and providing reasonable accommodations to applicants with physical and/or mental disabilities. If you are interested in applying for employment and need special assistance or an accommodation to use our website or to apply for a position, please send an e-mail with your request to hrrecruitment@calpine.com. Determination on requests for reasonable accommodation are made on case-by-case basis.

Please view Equal Employment Opportunity Posters provided by OFCCP here

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