City of St. Charles, MO
  • St Charles, MO, USA
  • $20.9864
  • Hourly
  • Full Time

Medical, Dental, Life and Disability Insurance; FSA; Retirement Benefits; Paid Vacation; Paid Holidays; Employee Assistance Programs and Educational Benefits.


Job Title

Waterworks Operator/Mechanic


Public Works

Posting Date

August 4, 2021

Closing Date for Resumes/Applications

Open Until Filled

Salary Range C Certification

Salary Range B Certification

Salary Range A Certification

$20.9864 - $28.0656 / hourly

$24.1260 - $28.7237 / hourly

$24.7697 - $29.3818 / hourly

Comprehensive, Cost Effective Benefits Package:

Medical, Dental, Voluntary Vision, Life and Disability Insurance; FSA; HSA; Retirement and Deferred Compensation programs; Paid Vacation; Paid Holidays; Employee Assistance Programs and Educational Benefits.





The City of Saint Charles Public Works Department is currently recruiting for the position of Waterworks Operator. The purpose of this position is to perform a variety of semi-skilled and skilled technical work in the operation & maintenance of water treatment facilities and systems. This position works a 12hr day and night rotating shift schedule of 40hrs per week.

Essential Duties and Responsibilities

The following duties are normal for this position. These are not to be construed as exclusive or all-inclusive. Other duties may be required and assigned.

  • Operate and maintain all water treatment plant systems, pump stations, generators, gauges, pumps, filters, controls and equipment.
  • Collect bacteriological and all other samples as required by MDNR.
  • Monitors the performance of and operates and maintains all equipment, electrical systems, gauges, and charts in the treatment plant, pump stations, generators, pumps, filters, and other control systems; Record data concerning plant operations
  • Charts lab test results for trend analysis and maintains accurate records of analysis and test results; evaluates data and writes reports as required.
  • Collects samples and identifies concentrations of chemical characteristics of water required in accordance with local, State and Federal requirements; gathers and tests water samples for reports as required.
  • Perform quality control tests on lab equipment and lab analysis; chart tests results for trend analysis; and evaluate procedures to assure accuracy of test results.
  • Calibrate and modify instrumentation and control equipment including recorders and other water quality monitoring equipment.
  • Assigned overtime as necessary, also may be assigned, to cover other shift openings.
  • Mathematically proficient in addition, subtraction, multiplication, division, geometry, trigonometry, and calculation of percentages, fractions, decimals, volumes, ratios, etc.

Minimum Training and Experience Required to Perform Essential Job Functions

  • High school diploma or G.E.D. supplemented by two (2) years post-secondary college or technical training in biology, environmental science, chemistry or a closely related field and two (2) years' experience in a utility, or any combination of education and experience that provides equivalent knowledge, skills, and abilities.
  • Working knowledge of equipment, facilities, materials, maintenance and operation activities, including laboratory procedures.
  • High level of mechanical ability, troubleshooting, mechanical diagnosis, and mechanical repair is highly desired.
  • Must possess knowledge of process controls, instrumentation, and minor electrical systems.
  • Valid Missouri driver's license required.
  • Must be able to climb tall heights using proper PPE to inspect water towers and equipment.
  • Department of Natural Resources Class C (B, or A) Water Treatment Plant Operator Certification Preferred. Minimum requirement of Class D Certification with ability to obtain Class C or higher certification within 18 months of hire.

How to Apply:

Online employment applications can be accessed on our City Website:

The City of Saint Charles is an Equal Opportunity Employer and participates in E-Verify

Full Job Description
City of St. Charles, MO
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