Top 91 Plant operator Jobs in Arnold, Mo

Water Treatment Plant Operator
City of St. Louis —St. Louis, MO
- $54,860 - $78,416 a year
- Overtime
- Engineering
- Mid-level
- Residential
Chemical Operator II/III
Crysalis Biosciences —Sauget, IL
- $22 - $40 an hour
- Full-time
- Inventory control
- 5 years
- Mid-level
- Health insurance
- Dental insurance
Quick Apply
CNC Setup Operator - Weekend 1st Shift
The H-J Family of Companies —High Ridge, MO
- 12 hour shift
- ERP systems
- Mid-level
- High school diploma or GED
- Profit sharing
- Paid holidays
CNC Setup Operator - 3rd Shift
The H-J Family of Companies —High Ridge, MO
- 8 hour shift
- ERP systems
- Mid-level
- High school diploma or GED
- Profit sharing
- Paid holidays
Machine Operator - Weekend Warrior Day Shift (Pacific, MO)
TRUE MANUFACTURING GROUP —Pacific, MO
- Full-time
- Mid-level
- Residential
- Ability to lift 50 pounds
Wastewater Operator
Village of Swansea —Swansea, IL
- $27 - $30 an hour
- Weekends as needed
- CDL B
- Carpentry
- Clean driving record
- Health savings account
- Health insurance
Quick Apply
13d
Rolling Mill Operator/Crane Opr
Gateway Aluminum —St. Louis, MO
- From $26 an hour
- 12 hour shift
- Computer literacy
- Writing skills
- Basic math
- Paid holidays
- Health insurance
Quick Apply
11d
Heavy Equipment Operator/Maintenance
Central Stone Company —Eureka, MO
- Urgently hiring
- Background check
- Heavy equipment operation
- Pass drug screening
Quick Apply
11d
Crane & Heavy Equipment Operator
Central Stone Company —St. Louis, MO
- Urgently hiring
- Background check
- Pass drug screening
- Mid-level
Quick Apply
12d
Operator, Production Tech II (1st shift) - St. Louis, MO
dsm-firmenich —St. Louis, MO
- Background check
- Mid-level
- 3 years
- Health insurance
- Paid time off
Quick Apply
2nd Shift CNC Machine Operator
Progress Rail —Alorton, IL
- $19.10 - $28.70 an hour
- Overtime
- High school diploma or GED
- Critical & Intensive Care
- Entry level
- Health savings account
- Paid holidays
Treatment Plant Operator Senior County Plant
Metropolitan St. Louis Sewer District —St. Louis, MO
- Full-time
- Pass drug screening
- Mid-level
- High school diploma or GED
Machine Operator I
Carlisle Construction Materials (CCM) —Maryland Heights, MO
- $24.71 an hour
- 5 years
- Writing skills
- Forklift
- Commuter assistance
- Health savings account
Quick Apply
2d
Maintenance Operator
Covia Holdings LLC —Pevely, MO
- $31.93 an hour
- Year round work
- English
- Mid-level
- Ability to climb stairs
- AD&D insurance
- Paid holidays
Quick Apply
Manufacturing Technician - Cyclotron Operator
Curium Pharma —Maryland Heights, MO
- 12 hour shift
- 3 years
- Mentoring
- Ability to sit for extended periods
Plastic Extrusion Operator
Serioplast —St. Louis, MO
- Full-time
- 5 years
- Senior level
- Health savings account
- Health insurance
Quick Apply
Shipping PIT Operator
International Paper —Fenton, MO
- $23.50 - $25.60 an hour
- Full-time
- Computer literacy
- Forklift
- High school diploma or GED
Chemical Operator
Chemtrade —East Saint Louis, IL
- $31.69 an hour
- 12 hour shift
- Mid-level
- Forklift
- High school diploma or GED
- Opportunities for advancement
Machine Operator
Serioplast —St. Louis, MO
- Full-time
- Mid-level
- Forklift
- Cleaning
- Health savings account
- Health insurance
Technical Services Operator
MISSOURI COBALT, LLC —Earth City, MO
- 12 hour shift
- Computer literacy
- Mid-level
- Forklift
Quick Apply

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plant operator jobs near arnold, mo

Water Treatment Plant Operator

City of St. Louis -
St. Louis, MO

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Job Details

Full-time
$54,860 - $78,416 a year

Qualifications

Computer operation
Laboratory instruments
Visual color comparison
Industrial equipment adjustment
Driver's License
Data interpretation
Industrial pumps
Computer skills
Industrial equipment
Algebra
Hand tools

Full Job Description

Description

Salary: $54,860 - $78,416

Position Grade: 210T

Department: Water Division

Job Type: Full-Time (Permanent)

Examination Number: EX1693

Location: St. Louis, MO

Incumbents in this position operate and maintain a coagulant house and filter plant in order to purify drinking water and ensure the safety of the drinking water system.

Essential Functions and Responsibilities:

Operates and maintains chemical feed equipment; calculates chemical feed rates.
Maintains and monitors clear well and treatment basin elevations.
Collects bacteria water samples in order to perform lab analysis.
Completes and updates daily log sheets and laboratory test results; enters data into computer.
Operates a mechanical scraper to clean and flush chemical lines; records chemical tank elevation readings.
Inspects water treatment related equipment in order to ensure proper and safe operation.
Receives and records chemical deliveries; monitors chemical storage areas.
Operates chlorine building.
Backwashes filters and sets for proper pump rate.
Replaces and repairs plumbing equipment.
Responds to chemical emergencies.

Knowledge, Skills, and Abilities:

Data Utilization: Requires the ability to perform basic level of data analysis including the ability to review, classify, categorize, prioritize and/or reference data, statutes and/or guidelines and/or group, rank, investigate and diagnose. Requires discretion in determining and referencing such to established standards to recognize interactive effects and relationships.
Human Interaction: Requires the ability to provide guidance, assistance and/or interpretation to others, such as coworkers and the public, on how to apply policies, procedures and standards to specific situations.
Equipment, Machinery, Tools and Materials Use: Requires the ability to operate, calibrate, tune and synchronize, and perform complex rapid adjustment on equipment, machinery and tools such as hand tools, chemical pumps, chlorine and laboratory equipment, computer and/or related materials used in performing essential functions.
Verbal Aptitude: Requires the ability to utilize a wide variety of reference and descriptive data and information such as chemical records, daily logs and lab reports, blueprints, correspondence and general operating manuals.
Mathematical Aptitude: Requires the ability to perform addition, subtraction, multiplication and division; may require the ability to perform mathematical operations involving basic algebra.
Functional Reasoning: Requires the ability to apply principles of rational systems. Ability to interpret instructions furnished in written, oral, diagrammatic or schedule form. Ability to exercise independent judgment to adopt or modify methods and standards to meet variations in assigned objective.
Situational Reasoning: Requires the ability to exercise the judgment, decisiveness and creativity required in situations involving the evaluation of information against measurable or verifiable criteria.
Environmental Factors: Tasks may risk exposure to adverse environmental conditions, such as odors, wetness, humidity, fumes, noise extremes, machinery, electric currents, toxic/poisonous agents or disease.
Physical Requirements: Requires the ability to lift, carry, push, and pull moderately heavy objects and materials, twenty to fifty pounds; and may occasionally involve objects and materials up to one hundred (100) pounds, such as lifting sacks of filter gravel and pushing gas cylinders. Tasks involve the ability to exert regular and sustained heavy physical effort with an emphasis on climbing and balancing which also involves stooping, kneeling, crouching and crawling in order to perform operations and maintenance duties.
Sensory Requirements: Requires the ability to recognize and identify similarities or differences between characteristics of colors, shapes, sounds, odors and textures associated with job-related objects, materials and tasks, such as interpreting lab results or detecting machinery malfunction.

Other Requirements:

Must be available to work varying shifts including nights, weekends, holidays, and overtime.

Qualifications

An Associate's degree in Engineering, Environmental or Industrial Technologies, Building Maintenance or a related field; or at least one year experience assisting in the operation of a water treatment facility. OR an equivalent combination of training and experience.

Certification: Must obtain a Missouri Public Drinking Water Treatment System Operator Certification (Class D) by completion of the working test period.

License: Must possess and maintain a valid driver's license while employed by the City of St. Louis. Must possess a valid driver's license at the time of filing application and be able to present it upon request. Please note type of license, number, class and expiration date on the Employment Application. Only qualified applicants who provide proof of a valid driver’s license will be considered for this position.

Scoring Components and Their Weights
Experience and Training: 100%
May be Subject to:

Background Investigation: Pass/Fail
Medical Examination: Pass/Fail

Documentation of Academic Credentials must be Submitted Upon Request

When completing the Employment History and the Educational/Training History sections of the Employment Application, please be as thorough as possible when describing your education, training and experience relating to this position. Applicants will only receive credit for their experience, training and education as shown on the application. Resumes will not be accepted as a substitute to a fully completed application. Incomplete applications will not be considered.

Veterans Preference Points

To be eligible for veteran's preference points, the applicant must submit a copy of their DD 214 Certificate of Release or Discharge from Active Duty with the Employment Application or upon request. The Director of Personnel may, in their discretion, accept alternate documentation.

City Residence Preference Points

City residents who pass an examination for a position in the classified service and do not receive any other preference will receive a five (5) point preference on a scale of 100 points on the exam. An additional one (1) point shall be added to the passing score of City residents who receive any other preference on a scale of 100 points. City residents must have resided in the City for at least one (1) year at the time of filing their application to be eligible for the preference points.

Accommodations

If assistance with the job application is necessary based on a physical impairment, mental impairment, or otherwise, they should reach out to the Office on the Disabled with contact information. This office will not disclose any information that an applicant or employee has a disability or has discussed possible accommodations without the applicant's or employee's prior consent.

Job Posting: Jun 30, 2026, 3:49:04 PM

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Refine Your Search

plant operator jobs in arnold, mo

Water Treatment Plant Operator

Chemical Operator II/III

CNC Setup Operator - Weekend 1st Shift

CNC Setup Operator - 3rd Shift

Machine Operator - Weekend Warrior Day Shift (Pacific, MO)

Wastewater Operator

Rolling Mill Operator/Crane Opr

Heavy Equipment Operator/Maintenance

Crane & Heavy Equipment Operator

Operator, Production Tech II (1st shift) - St. Louis, MO

2nd Shift CNC Machine Operator

Treatment Plant Operator Senior County Plant

Machine Operator I

Maintenance Operator

Manufacturing Technician - Cyclotron Operator

Plastic Extrusion Operator

Shipping PIT Operator

Chemical Operator

Machine Operator

Technical Services Operator

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