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Plant Assistant Jobs in California (NOW HIRING)

Holliday Rock

Plant Assistant Ready-Mix

Goleta, CA · On-site

$25/hr

The Plant Assistant works under the direction of the Area Manager, Plant Manager, or Assistant Plant Manager to support the safe and efficient production of concrete. This role includes general labor ...

Holliday Rock

Plant Assistant Ready-Mix

Vernon, CA · On-site

$23 - $25/hr

The Plant Assistant works under the direction of the Area Manager, Plant Manager, or Assistant Plant Manager to support the safe and efficient production of concrete. This role includes general labor ...

DTE Energy

Utility Plant Assistant Manager

Woodland, CA · On-site

$125K - $187K/yr

Woodland, CA The Assistant Plant Manager (APM) provides leadership to the operations and maintenance groups for the daily operation of the facility under the general direction of the Plant Manager.

DTE Energy

Utility Plant Assistant Manager

Woodland, CA · On-site

$125K - $187K/yr

Woodland, CA The Assistant Plant Manager (APM) provides leadership to the operations and maintenance groups for the daily operation of the facility under the general direction of the Plant Manager.

Joseph Farms

PRODUCTION PLANT SUPERVISOR I

Atwater, CA · On-site

$71K - $94K/yr

Comply with GMP's in the plant. * Assist in the maintenance of Food Safety and Quality system. Organizational Relationships: Position reports to the Plant Manager. Direct reports for this position ...

Bristol Management Services

Yard Worker

Indio, CA · On-site

$20 - $24/hr

Safely load and unload equipment and materials onto vehicles/plant. * Assist in maintaining orderliness of yard. * Follow directives accurately and efficiently. * Effectively communicate with ...

Joseph Farms

PACKAGING PLANT SUPERVISOR

Atwater, CA · On-site

$70K - $85K/yr

Comply with GMP's in the plant * Assist in the maintenance of Food Safety and Quality systems Organizational Relationships: Position reports to the Packaging Plant Manager. Direct reports for this ...

Holliday Rock

Aggregate Production Assistant

Upland, CA · On-site

$25/hr

The Plant Assistant works under the direction of the Area Manager, Plant Manager, or Assistant Plant Manager to support the safe and efficient production of concrete. This role includes general labor ...

New

PENCCO, Inc

Assistant Plant Manager

Vernon, CA

The Assistant Plant Manager will be responsible for assisting the Plant Manager (PM) with all aspects of operations at the chemical manufacturing facility, ensuring safety, efficiency, and regulatory ...

Pencco, Inc

Assistant Plant Manager

Vernon, CA · On-site

The Assistant Plant Manager will be responsible for assisting the Plant Manager (PM) with all aspects of operations at the chemical manufacturing facility, ensuring safety, efficiency, and regulatory ...

Pencco, Inc

Assistant Plant Manager

Vernon, CA · On-site

The Assistant Plant Manager will be responsible for assisting the Plant Manager (PM) with all aspects of operations at the chemical manufacturing facility, ensuring safety, efficiency, and regulatory ...

New

A. Duda & Sons Inc.

Assistant Plant Breeder

Salinas, CA · On-site

Assistant Plant Breeder Location: Salinas, CA Department: Research & Development Position Type: Full-Time, Exempt Join Our Research & Development Team Duda Farm Fresh Foods is seeking an innovative ...

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Infographic showing various Plant Assistant job openings in California as of August 2026, with employment types broken down into 1% As Needed, 70% Full Time, 23% Part Time, 1% Temporary, and 5% Contract. Highlights an 98% Physical, 1% Hybrid, and 1% Remote job distribution.

Plant Assistant Ready-Mix

Goleta, CA • On-site

Holliday Rock
Construction • 501 - 1,000 employees

7.9

Company rating: 7.9 out of 10

Based on 10 frontline employees who took The Breakroom Quiz

Great coworkers

People enjoy working here

Good employer

Learn more about Holliday Rockexternal

$25/hr

Full-time

Medical, Dental, Vision, Life, Retirement, PTO

Posted 18 days ago

Job description

Description
Description:
The Plant Assistant works under the direction of the Area Manager, Plant Manager, or Assistant Plant Manager to support the safe and efficient production of concrete. This role includes general labor, equipment operation, and maintenance duties to ensure smooth plant operations.
Essential Functions of the Position:
• Perform physical labor tasks such as digging, lifting, carrying, and moving materials.
• Operate loaders, yard tractors, water trucks, sweepers, and any other equipment necessary.
• Utilize preventative maintenance on all yard and plant equipment to ensure they function properly.
• Perform pre-/post-trips on equipment to ensure that the equipment can be operated safely.
• Load and unload materials and equipment from trucks and other vehicles.
• Maintain a clean and organized work area, including cleaning up debris and waste.
• Adhere to all safety regulations and protocols, including wearing appropriate personal protective equipment (PPE).
• Communicate effectively with supervisors and coworkers.
• Perform other duties as assigned by supervisors or plant managers.
• Able to work full time and overtime if needed.
• Able to travel and work at other plants when needed.
Skills and Knowledge:
• Basic mechanical knowledge to assist in diagnosing, reporting, and repairing minor equipment or production issues.
• Ability to operate heavy equipment such as loaders, yard tractors, man lifts, etc.
• General understanding of equipment safety and maintenance procedures.
• Strong communication and teamwork skills.
Requirements:
• Must have a valid Class C driver's license.
• Must have reliable transportation.
• Driver record cannot contain any reckless driving offences, DUIs, leaving the scene of an accident, etc.
• Driver record cannot contain more than 1.5 active points in the last 36 months.
• Ability to follow written and verbal directions and to complete assigned tasks on schedule.
• Ability to read, write, and communicate effectively in English.
• Ability to work with supervision, receiving instructions/feedback, coaching/counseling and/or
action/discipline.
Physical Demands:
The physical demands described here represent those that must be met by an employee to perform the
essential functions of this job successfully. Reasonable accommodation may be made to enable individuals
with disabilities to perform the essential job functions:
• Ability to work outside in various weather conditions while sitting or standing for extensive periods of
time.
• Ability to kneel, reach, or lift to 50 pounds or more.
• Ability to climb ladders to access higher elevations on batch plants.
Benefits:
• Medical Insurance, Dental HMO/PPO, Vision, Basic and Voluntary Life, and Voluntary Accident.
• Employee Assistance Program (EAP)
• 401 (k) Retirement Plan- Company match
• Paid Sick time.
• Paid Holidays
• Paid Vacations
• Direct Deposit
• Paid weekly.
• Referral Bonus
This job description does not imply that the listed duties are the only responsibilities of an employee in this
position. Employees may be asked to perform additional tasks as needed to ensure adequate workload coverage.
Furthermore, employees must follow any job-related instructions and complete any other duties assigned by their
supervisor. This job description does not constitute an employment agreement between the employer and the
employee and may be changed by the employer as organizational needs and job requirements of the job change.
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About Holliday Rock

Sourced by ZipRecruiter

Holliday Rock holds the beliefs that long term success requires common Goals, Adaptability, Shared values, and most importantly safety. Holliday has a very diverse employee base with a wide range of Education levels, Cultural diversity, and Industry experience. Holliday Rock takes great satisfaction in having retired employees with over 50 years of service as well as hiring new employees just getting their careers started.

Industry

Construction

Company size

501 - 1,000 Employees

Headquarters location

Upland, CA, US

Year founded

1937

Social media

Facebook

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